By your statement then reddit was complicit with the Russian trolls during election season because the bitcoin trolls who evolved into trump trolls were not punished in the slightest (I have a list of 300+ usernames that are still active today)
The point is that Reddit tries to moderate, which is good enough for their providers (AWS/Fastly).
The 8ch takedown wasn't actually due to issues with moderation, since (at least based on the owner's video) 8ch removed the post, actively responds to real law enforcement requests, and the original post was actually posted to IG. The issue was that CF was getting enough bad press, and more importantly enough calls/concerns from real Enterprise clients (this is speculation on my part), to take down the website.