There are currently ~2300 works in AO3 tagged with "Created Using Generative AI"
I'll be upfront with my opinion, which mirrors my opinion in regards to my field: using AI will only hasten your own obsolescence. The point of fanfiction is not to crank out fics, but rather to enjoy the hobby and communities of writing and fandom.
This is what happened when a fanfic site is profit driven. Wattpad sucks 😞
The email from Wattpad is so condescending imagine pressuring writers to update and work while they are doing it for free and fun. Also the discovery? Algorithm? Of Wattpad looks like a stressful popularity contest 😑