This is similar to what happens with humans. Females will use an app to quickly scroll through a lot of men, but because they are presented with so many options they will gravitate only toward the top tier men. But the top tier men can only be with so many females, so the majority of females will not get the top tier. However, their standards will still be raised and they will not settle for someone lower. So females will continue searching for this perfect specimen of men and refuse to mate with other males. The other males end up leaving the app and revenue is lost.