Came here to report, beg for help, see this thread is already up.
I realize Itch is very busy at the moment, and perpetually short-staffed, but there are a variety of solutions to this that seem like they would be fairly simple and fast to implement, test, and roll out. To my mind the best would be a toggle creators can switch on that blocks accounts younger than 6 months from posting links, or barring that, a toggle that only allows whitelisted users to post links.
Please DO NOT just take away links in comments, they are useful and needed for a variety of legitimate situations between creators and fans/customers.
In this case the raid/spam is so braindead a simple text filter would work too, but that will ultimately just lead to a game of wack-a-mole.