Twitter got to sell itself for a significant premium over market that they had to sue to close on, so they won big there.

I see your point though. There are some people willing to take action and if one of those people is the richest in the world, those actions can be quite consequential. But that is one person, not society at large (either the power users of Twitter or the casual users of Twitter). Twitter didn't enter a commercial death spiral for banning Trump.