I would imagine a place shouldn't even need rules for that in the first place, but I understand people arent always the most kind they can be online.

I think also, a lot of what is called "bigotry" is often being subjectively identified (that is, one person thinks a thing is bigoted while another doesn't, certainly one cannot and should not always default to agreeing that every interaction is bigoted otherwise no interaction would be allowed anywhere), but I would imagine a vast majority of "bigotry" would still fall under the very vast "slurs racial or otherwise" or "targetted harassment" exceptions.

I dont know all the details, but its possible these admins may have been overly strict in removing content they considered bigoted to the point of being disruptive. I used to operate a forum back in the early 2000s (for reverse engineering video game software) and there was one moderator I had to remove because they were too strict in their deletion of content for a similar reason. Entire threads would be left graveyards and there was no way to discern the context.

I am only presenting my own speculation of course. What you're saying is also possible. The only way to know is to wait and see what happens. I think a big problem for those platforms is how quickly people bandwagon leaving when a small group decry a potential problem. It's like when people try a new game with a low player population, then call the game dead. Those people leave, and they tell everyone else the game is dead. So nobody really joins, except the bottomfeeders nobody else wants.