Personally I think Twitter would work best if it was left to be just that. I don't think anyone really cares about what I have to say, for example. I'm just some random guy who works at a software company, and just being honest I don't believe that I have contributed anything super valuable to the world thus far. If I do, maybe I become someone important in my field or part of launching some important project/company, then maybe I could be invited to Twitter. Kind of like those high end credit cards that one has to be invited to based on their income/asset level.
Then again, I have no idea how that would make money (besides showing ads to followers like me) so I'm back to just following those important people for now lol. No way I'm paying money to view twitter, I'm cutting down on how much I spend on these monthly subscription services.