Assuming you are moving away from itch, do i get to keep my copy of the game?
Yes, in the worst case where one of my games is hit on a follow-up wave of bans I will create a list of everyone that purchased that game and create a game key for them and just have the old versions of the game marked as either a free download or give people access to the share drive of the build archives.
worst case scenario on itch https://www.wired.com/story/itchio-restoring-free-nsfw-games/ which means if you want to make actual money you'd have to do it elsewhere.