That's my point. The reason vBulletin forum moderators aren't equivalent to Big Tech censorship is that you can run your own vBulletin, independent of theirs. Censorship of Facebook is bad because that isn't an option.
Case in point: a number of Youtubers fed up with the platform demonetizing and delisting their content are advertising their content on other video platforms, or just hosting their own like Corridor Digital.
The web is one of the few examples of the free market actually working, but people have fallen for the defeatist and nihilistic narrative about the "centralization" of the web and "control" by sinister forces, insisting that competition with any big platform is simply impossible.
They said that about MySpace too and look what happened.
No it wouldn't. As big as Facebook is, they still only moderate their own platform, and there is only one instance of Facebook. Separate vBulletin instances do not constitute a single, collective "vBulletin platform." The narrative of "Big Tech" as an organized leftist conspiracy orchestrating censorship over all social media is simply right-wing propaganda.