This painting artist (regular Painter career I think) I hardly ever played, but her painting skills was at level 6. Maybe it is something that activates on a higher skill level?
I have everything turned on, including Fame, but this does not seem like the acting agent thing. Hm, I better explore it, maybe that Agent will give my painter specific "gigs" that pays off better...
Adding: Aha, @CelSims you were right - it must be related to a Fame perk, and has nothing to do with her career. The sim is actually a 3 star cleb. Hm...So confusing, I thought it was career related as it sorted under the career option on her phone lol. I never really learned about all those perks because i play rotationally and fame level can suddenly be reduced and perks gone, so I never relayed on them. Anyway the "Agent §150" option seems to be an PR Agent regarding her public image as a famous person. Dang!