But if people really are making a lot of Bitcoins, I would like to know. I see payments here not really worthwhile for the effort of having 100s of followers.
Yes, there isn't much to do. Also, I don't think people are making lots of Bitcoins with Twitter, only a little extra income in Bitcoins (what is very helpful on long term). Maybe only few people are making big money there, but they are famous or have much influency over others, so they can have sponsors who will pay them decent amounts of money to make advertisement, similar to sponsored Youtube channels (not Youtube ads, but brands promoted on the video).