I always remember of snapchat when talking about easter eggs. They have been adding easter eggs throughout their app’s history in a wide variety of ways. Since they created a visual language for their app that is very colorful and happy I tend to imagine easter eggs having those qualities.
While I do think hat is one way of efficiently applying easter eggs onto an app, I don’t think that should be the only way we envision them, mainly because quirky, colorful and jumpy experiences don’t atch with every app’s experience. Content oriented easter eggs is an alternative that pops up to mindo when thinking of partially alternative ways of easter egging.