I think a few of them, although most social apps are bound to have these kinds of features: hijack#2 (slot machine): you get a notification when you receive a

I think a few of them, although most social apps are bound to have these kinds of features: hijack#2 (slot machine): you get a notification when you receive a snap but you don't know what it is until you open it hijack#3 (Fear Of Missing Something Important): snapchat stories disappear after 24hr, so if you don't wanna miss content from your friends you must make sure to log in at least once a day hijack#4 (Social Approval): when you post a story you can see how many people viewed it hijack#5 (Social Reciprocity): when someone sends a snap to you personally and not to their story you feel compelled to send something back