The most valuable player in a mobile game is rarely the one who just installed it. Studios spent most of the last decade optimizing for the download, the first session, and the day-one hook, yet the economics behind that playbook have quietly come apart. What keeps a free-to-play title breathing now flows overwhelmingly from people who already stayed for weeks, the ones who turned a trial into a habit without anyone asking. So the reward systems once built to greet newcomers are being torn down and reassembled around the players who refuse to leave.

Anyone who has watched an airline protect its frequent-flyer tiers already recognizes the shape of this shift. Across American consumer businesses, incentive design has tilted toward existing customers rather than first-timers, mostly because the audience that already shows up is cheaper to reach and far likelier to act on an offer.…