Why a small guaranteed drop kills a big uncertain one

The gacha adds a pity system: pull ninety times without the featured item and the ninetieth pull gives it to you, guaranteed. Players cheer the change as consumer-friendly. It is also the feature that keeps them pulling, because a gamble with a promised floor is one you can justify entering, where an open-ended one you would eventually quit.

What everyone sees

A guaranteed drop after a set number of tries looks purely protective — a ceiling on bad luck, a concession to fairness. Its quieter effect is to sustain the gamble. A wholly uncertain lottery eventually feels hopeless and is abandoned; a lottery with a guaranteed endpoint feels bounded and rational to keep playing, so the floor that limits the worst case is also what removes the natural reason to stop.

What is actually happening

Tversky and Kahneman’s work on the framing of decisions shows that people place disproportionate weight on certainty, valuing a guaranteed outcome far above a merely probable one of similar expected value — the certainty effect first sharpened by Allais’s paradox, in which the appeal of a sure thing distorts otherwise consistent preferences. A pity timer manufactures a pocket of certainty inside a game of chance: the eventual drop is guaranteed, so the whole activity inherits the reassurance of a sure thing, and the player treats continued pulling as progress toward a certain reward rather than repetition of an uncertain one.

Why it stays hidden

The mechanism hides because the floor is genuinely a benefit, so it is received as mercy and never examined as a lever. The player feels safer and therefore stays, without noticing that feeling safe is precisely what keeps them spending. Because the guarantee is distant — ninety pulls away — most of the activity before it remains ordinary gambling, wearing the reassurance of an endpoint most players pay heavily to approach.