I think technically whoever created that AI persona is now profiting from the work they put into creating and maintaining that. It's different than what a human influencer does, but the money they are generating still goes into someone's pocket, not dissolving into thin air. This isn't AI stealing people's jobs, it's someone stealing someone else's market share. It's like a guy with a saw complaining that a guy with a chainsaw is stealing their business.
If it's at all profitable it will end up being companies making up a bunch of new personas eventually. That might be good in that it's more jobs per "influencer," but also maybe lower paying.
Although I'm pretty sure this already happened with fake Instagram models and I don't think it ever really went anywhere. It was just a novel thing for awhile.