I'd like to know about this as well. My hacked Switch hasn't been banned, but surely will if I connect to the net.
With Friday the 13th, I'm totally fine playing offline. But, with Single Player Challenges, you can't fully complete certain ones unless you use specific Jasons. Without being able to earn XP and level up to 44, you'll never be able to unlock them all and are forever stuck with using only Part 3 Jason and Roy (Part 5) for challenges and offline bots, and also can't unlock any kills besides the couple default ones.