This is actually the answer to @BeigeShiba 's question.
They focus on improving the experience for the bluechecks because the only reason people are here is due to them. There's no point in owning the bluechecks if they don't see it and freak out about it.
"Only" is strong but defensible. Two twitters isn't stable b/c it's social so everyone wants access to all the tweets that everyone is talking about. The bluecheck owners follow the bluechecks, the bluechecks stick together.