Yes. They consider it a violation of their "forking policy"[1].
Fun(?) fact – Fandom put even more restrictions right after Minecraft Wiki moved[2]. Now it doesn't even allow wikis to put a banner on their main page saying that there's a forking discussion unless they contact Fandom support and get permission.
That is correct. However the jagex funding is not really enough[1] so they added ads. The League wiki seems to be also under this model, but I suppose they got a better deal. The Minecraft Wiki doesn't have any ads at all, and it's just been feeding off by the runescape wikis.
Woah, I didn't know that what jagex has paid for basically only covers the infrastructure. It's crazy considering how central the wiki is (because the game is very far from "self documenting"). Thanks for the info!
That would be Miraheze [1]. Community funded wiki farm. However it's had some instability such as internal conflict and server issues, but it's better than all the alternatives.
[1]: https://www.minecraft.net/en-us/credits (ctrl+f "Markus Persson") [2]: https://minecraft.wiki/w/Java_Edition_19w13a#General_2