Tinder does this to some extent by limiting how many "right swipes" a non-paying user has every 12 hours. I don't know if that is enough of a scarcity to reall

Tinder does this to some extent by limiting how many "right swipes" a non-paying user has every 12 hours. I don't know if that is enough of a scarcity to really change any behavior though. At the very least it discourages the strategy of blindly swiping right as fast as possible and then choosing a mate from the intersection of "those who also swiped right on you" and "people you'd ever consider dating".