> I feel like the gig economy (things like Fiverr)

Predictably this is already happening, it doesn't take much browsing in categories such as tattoo design to spot the hallmarks of AI generated artwork. To add insult to injury they often pretend they aren't using AI, so they can up-charge for more intricate artwork that would take more effort if they weren't really just adding more synonyms for "detailed" to their Midjourney prompt.

Fiverr does have a dedicated category for AI art, but they don't seem to be making any effort whatsoever to keep AI art out of every other category, so it's pointless.