Responses
They probably do know but they are buying from Magnus due to availability,Magnus buyers are probably people of upper middle class to middle high class that know they can't afford the exclusive perfume of the queen bee and gentlemen club
Honestly though, how does magnus have any costumers at all when selling copycat perfumes. People could easily trace both of them to ariel
considering that the first one was first used by the queen bee of social circles (charlotte), everyone immediately wanted to know more about it and who made it. The gentleman club had direct contact with ariel when she introduced her new perfume for men and so they would all know who made it.
Most of the social circle and gentleman club would realize that magnus stole ariel’s perfume, and what noble would buy from such a shameful person? normally they’re so prideful in themselves, it would make more sense if they wanted to distance themselves from magnus