1. I've never read or heard anyone from any of these social media platforms make this claim.
2. Even if they did, I don't see how any of this would be covered under "false advertising" protections because I don't know anyone who actually PAYS to use any of these stupid things.
They get a Section 230 exemption from liablity. By editing content they should not be protected.
So when they ban you or stop you from monitizing (sharing ad revenue thru traffic) for content “they” deem inappropriate they could be sued.
As of now they can’t be sued.