Twitter is the country club for right and left wing elites. They don't care about viewership, they want to influence each other and chat.

They have thousands of other ways to influence the masses by owning media, other discussion platforms, owning institutions and foundation members and running PR campaigns.

It is better if their actions on Twitter are observed, documented and archived rather than letting them have complete privacy. That is also why journalists of all political leanings are still there.