Facebook is just as restrictive as Google. Vimeo doesn't compare to YouTube in any way. To follow the analogy of the parent comment, Vimeo is like only being able to publish on the Amazon app store.
If we accept this ownership of the digital space by corporations, our future is looking very bleak.
I'm more concerned that if a migration happened to Vimeo, you'd end up in the same spot. Speech doesn't presume an easy to reach audience. I'm fine with YouTube and its ilk not surfacing things organically if they don't want to or even de-monetizing- but I do object to total de-platforming based on non-illegal content. People have to have /somewhere/ to go.