What heretical software features can you imagine that would never fly at a growth oriented company but could totally work on free open source social media?
For example, algorithmic timelines are one way to deal with information overload. But what if instead your software offered suggestions for people to unfollow (this person posts a lot and you hardly ever interact with them)? Not necessarily a good idea but it's an idea we could implement that would NEVER happen on Twitter, Facebook, etc