Voat died because they took a max free speech approach, even allowing racism and stuff. Lemmy does not have a central administration that can make decisions like that, as each instance gets to decide if they federate with another instance or not.

There's no doubt going to be a banlist that gets shared amongst the biggest, most popular instances to get rid of the trolls.

I don't know, I was there in the beginning. I think it died because it had no real content, compared to reddit. And, all anyone talked about was reddit, or reposted stuff from reddit, just like we're seeing here. I think this might stick a bit better because reddit is way bigger than it was back then, so even if the same % of users came over, it would still be quite a bit more content.