OkCupid used to work on the basis of high bandwidth of information and excellent matches. This wasn't profitable enough though so they changed to the Tinder-st

OkCupid used to work on the basis of high bandwidth of information and excellent matches. This wasn't profitable enough though so they changed to the Tinder-style swiping which doesn't work. More engagement interactions means more opportunity to show ads. If you find people good matches they will just leave the app.