Unless their hobby is literally 'flaunting wealth in their signature when communicating with their customers', then yes I think they should be able to be a hobbyist of whatever they please.
From what I gather, OCUK's reputation in the context of scalping is declining. I might be wrong about this as I'm an infrequent visitor. Personally it sickens me that any purchase I make on OCUK directly funds a super car hobby, as amply demonstrated on this forum.
Perhaps I am the thing that needs to extinguished for having this mindset, rather than the masses who boot lick and worship their betters that directly profit off of them and proceed to gargantuan displays of their wealth off their customers.
Personally, if I had such wealth, I'd be rather more discreet about it. I consider it a feather the in the cap of all of OCUK's competitors that I won't have '0.1% elitism you just funded' rubbed in my face.