this is the only example i can think of, because it's the only one i ever followed, but i'm sure there's more. brent corrigan, former porn star. he was already really well known in the gay porn industry, when his boyfriend made him quit because he didn't want brent doing porn. brent then decided to instead try acting. he was never able to make it mainstream. he landed a couple indie roles that made no noise, and then ended up quitting on acting because he couldn't get any acting jobs, due to his porn past. once him and his boyfriend broke up, brent returned to porn, i remember watching the livestream where he told the story