I want to make sure I am understanding your argument and not overstating it. You believe that it is unnecessary and threatening for a commercial online platform to post written guidelines that spell out circumstances under which it will stop hosting certain content or creators - just like a bartender announcing she has a baseball bad under the register is making an unnecessary, threatening announcement?
I had the timeline of events completely wrong. I misunderstood.
I thought some people had had their content removed after it had been reviewed and approved. Then other creators complained about it on social media. Then DTRPG removed all
their content (in apparent retaliation?). Then the social media complaints turned into attacks on DTRPG. Then possibly more people were removed from DTRPG(?). Then and only then did DTRPG update their policy. All of this was basically completely backwards or incorrect, it seems, although maybe I'm still wrong.
Instead, it looks like the real timeline is closer to: if content was removed it was under existing review policies for customer reported issues under the existing content policies. Then people complaint about DTRPG on social media over it. Then DTRPG updated their policy to say, basically, that they'll consider completely ending business relationships with creators who try to litigate complaints over social media.
To be clear: I think DTRPG is actually within their rights in both
cases -- they never give up their freedom of association -- but the former was a lot more concerning because it kept sounding like they were acting outside of their explicitly stated policies. Then they changed policies after the fact, either to excuse their behavior or to, yes, threaten others who were still criticizing them on social media. It turns out that no, that doesn't seem to be what happened. In short, I thought it was closer to the Roll20 2018 controversy, but instead it seems to be a pretty normal response by DTRPG.
I do think there are larger and more general issues with platform vs publisher vs customer that haven't been addressed yet -- there's a reason YouTube creators made Nebula -- but I don't think this is an example of that problem coming up any more.