The quarterly ritual of the corporate earnings call has become a showcase for a singular metric: the size and growth of loyalty programs. In recent reporting cycles, the numbers shared by travel industry leaders have been nothing short of staggering. Marriott International revealed that it added 75 million members to its Marriott Bonvoy program in just two years, pushing its total membership to a record 271 million. Hilton Worldwide Holdings followed suit, announcing a membership base that has crossed 243 million. Meanwhile, in the online travel agency (OTA) sector, Booking Holdings reported a significant shift in its business model, moving its direct channel—bookings made directly through its platforms rather than through third-party intermediaries—from the low 50% range to the mid-60% range as a share of total room nights.
While executives beam at these figures and analysts generally offer nods of approval, a fundamental question remains largely unaddressed: Is this massive expansion of loyalty ecosystems actually making it cheaper to acquire the next customer? The traditional premise of a loyalty program is straightforward. A company invests heavily in marketing to acquire a customer for the first time. By offering points, elite status, or exclusive perks, the company incentivizes that customer to return. Theoretically, each subsequent booking from a loyal member should cost significantly less to secure than the initial acquisition. Consequently, marketing spend as a percentage of total revenue should decrease as the proportion of loyal, repeat customers increases. However, a rigorous analysis of SEC filings from 13 major companies across four sectors—OTAs, hotels, airlines, and cruises—suggests that this correlation is becoming increasingly decoupled in the modern digital economy.
The Evolution of the Loyalty Flywheel
The concept of travel loyalty is not new, but its scale and function have evolved dramatically since the inception of American Airlines’ AAdvantage program in 1981. Originally designed as a simple frequency reward system, loyalty programs have transformed into multi-billion-dollar financial entities. For many airlines and hotel chains, these programs are no longer just marketing tools; they are high-margin business units that sell points to banks and credit card issuers.
The "loyalty flywheel" was supposed to create a self-sustaining cycle of growth. By 2021, as the travel industry began its post-pandemic recovery, the focus on direct-to-consumer relationships intensified. Companies realized that reliance on third-party search engines and social media platforms for traffic was a costly vulnerability. The push to sign up members became a defensive strategy against the rising costs of digital advertising on platforms like Google and Meta. Yet, despite the massive influx of members between 2022 and 2024, the expected efficiency gains in marketing expenditure have remained elusive for many of the industry’s biggest players.
Analyzing the Sector-Specific Data
To understand the disconnect between membership growth and acquisition costs, it is necessary to examine the financial performance of the industry leaders over the last three fiscal years.
Hotels: The Brand Proliferation Strategy
In the hotel sector, Marriott and Hilton have focused on "brand proliferation"—launching new brands to capture every possible niche of the market. While this has successfully driven membership numbers, it has also required a sustained level of marketing spend to build awareness for these new sub-brands. According to SEC filings, while Marriott’s total revenue surged alongside its member base, its promotional and distribution expenses have stayed relatively high as a percentage of revenue. The cost of maintaining a "loyalty-first" ecosystem includes not just the points themselves, but the technological infrastructure required to personalize offers for 271 million individuals.
Online Travel Agencies (OTAs): The Battle for Direct Traffic
Booking Holdings and Expedia Group have perhaps the most difficult task. Unlike hotels, they do not own the physical assets. Their value lies in their interface and their ability to capture demand. Booking Holdings’ success in growing its direct channel to the mid-60% range is a significant achievement, but it has come at a price. To keep those users coming back to the app rather than clicking a sponsored link on Google, the company must spend billions on brand advertising and "Genius" loyalty discounts. For OTAs, the "loyalty" of a customer is often fleeting, frequently dependent on who offers the lowest price at the moment of search.
Airlines and Cruises: High Stakes and High Costs
Airlines have the most mature loyalty programs, with Delta’s SkyMiles and United’s MileagePlus acting as massive revenue drivers through credit card partnerships. However, the operational costs of these airlines—fuel, labor, and fleet maintenance—often dwarf the marketing efficiencies gained through loyalty. In the cruise sector, companies like Royal Caribbean and Carnival boast high repeat-guest rates, yet they continue to spend aggressively on "wave season" marketing to fill ever-larger ships, suggesting that even a loyal base cannot fully offset the need for constant new-customer acquisition.
The Rising Cost of Digital Visibility
One of the primary reasons loyalty programs aren’t lowering overall marketing costs is the inflationary nature of the digital advertising market. Even as a company grows its loyal base, it must still compete for the "undecided" traveler. The cost-per-click (CPC) on major search engines has risen steadily over the past decade.
Furthermore, the definition of a "loyal member" has become diluted. In the race to report high numbers to Wall Street, many companies have made it incredibly easy to join a loyalty program—often offering an immediate discount for simply providing an email address. This creates a large pool of "passive members" who may have signed up for a one-time benefit but lack any true brand affinity. These members must still be reached through expensive retargeting ads and email marketing campaigns, which prevents the marketing-to-revenue ratio from falling.
Official Responses and Executive Perspectives
Industry executives have defended the continued high spend, arguing that loyalty is about "lifetime value" (LTV) rather than immediate cost reduction. During a recent investor day, Marriott CEO Anthony Capuano emphasized that Bonvoy members spend more per stay and book more frequently than non-members. From this perspective, the goal of the loyalty program is to increase the "top line" (total revenue) rather than strictly decreasing the "bottom line" of marketing expenses.
Similarly, Glenn Fogel, CEO of Booking Holdings, has frequently noted that while the company aims to increase direct bookings, it will not retreat from paid performance marketing as long as the return on investment (ROI) remains positive. The consensus among travel leadership appears to be that in a hyper-competitive global market, one cannot afford to stop spending on acquisition, regardless of how many hundreds of millions of members are already in the database.
Chronology of Modern Loyalty Milestones
- 2016-2018: Major hotel mergers (e.g., Marriott and Starwood) consolidate loyalty bases, creating the first "mega-programs."
- 2020: The pandemic brings travel to a halt; companies pivot to using loyalty programs as collateral for multi-billion-dollar loans.
- 2021: Travel begins to rebound; companies launch aggressive "member-only" pricing to lure customers away from OTAs.
- 2022-2023: Record-breaking membership growth is reported as digital adoption accelerates.
- 2024: Analysis reveals that despite record membership, marketing expenses for many travel firms remain at or above pre-pandemic levels as a percentage of revenue.
Broader Implications for the Travel Industry
The failure of loyalty programs to significantly lower acquisition costs has several long-term implications for the travel industry. First, it suggests that the "moat" created by a loyalty program is not as deep as previously thought. If a customer is a member of five different hotel programs and three different airline programs, their "loyalty" is fragmented and easily swayed by price or convenience.
Second, the increasing cost of maintaining these programs—ranging from IT security to the financial liability of unredeemed points—could eventually lead to a "devaluation" cycle. We are already seeing this as airlines and hotels increase the number of points required for a free stay or flight, a move that risks alienating the very members they worked so hard to acquire.
Finally, the data suggests that the travel industry may be reaching a point of diminishing returns regarding membership size. If adding the next 50 million members does not provide a measurable boost to marketing efficiency, companies may eventually be forced to shift their strategy from "customer acquisition" to "customer depth"—focusing on extracting more value from existing high-tier members rather than simply chasing raw numbers.
In conclusion, while the headline-grabbing membership totals of Marriott, Hilton, and Booking Holdings signal brand strength, they mask a complex and expensive reality. The digital landscape has changed the rules of engagement. In an era of infinite choice and rising ad costs, loyalty is no longer a shortcut to lower expenses; it is a high-stakes, high-cost requirement for staying in the game. Analysts and investors would be wise to look past the total member count and focus instead on the margin trends that reveal the true health of the travel industry’s most prized assets.
