It's so weird how yikyak blew up then rapidly failed. I used it pretty heavily in undergrad and popularity didn't seem to wane during that school year when it got big. It just died over the summer since you were geolocked to your hometown, then it inexplicably never picked up again the next school year, just dead on arrival. Had they let people still use their collegiate yikak while off campus for the summer, yik yak might have been a juggernaut by today. I still don't think the niche has been captured: an anonymous, hyperlocal twitter/reddit hodgepodge, fueled solely by original and genuine campus memes and therefore immune to corporate ad peddling like global networks. Maybe that's why it failed.