Well of course this was going to happen. If you remove "objectionable subs" (which is arbitary as I will explain below), the first place they will move is the places that won't remove them and then people say "look see this is what happens when you don't do moderation, this place is toxic man". Well of course they are going to be concentrated on the sites that don't have stasi like moderation. This has to be some form confirmation bias.

Btw what is a "objectionable content" can be completely arbitrary e.g. a subreddit that was a criticism of consumer culture was removed, there was nothing on there that could be considered objectionable. I won't even get into the removal of criticisms of the Chinese Communist Party since Chinese companies own a large stake in reddit now.