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You were banned from game jams for spamming your game into over a dozen jams with no regard for the rules.
We do not have a rule about the number of jams you are allowed to join, because it’s not about that. If we give you a number then we’re just telling you that it’s okay to spam up until a certain limit. Instead we ask that you respect jam hosts and only submit to jams that are appropriate for your project, or don’t participate in jams at all. Jams are not a free-for-all for promoting your game.
Your only option is to Contact Support, explain your situation.
I think Itch didn’t limit how many game jams i could join?
There is no limit, but that’s assuming your game fits into all game jams. If you submit a game into a lot of game jams, and it doesn’t fit into some of them, it can easily be seen as spamming. Make sure to read the jam’s rules carefully before submitting an entry.