Don't go after the art guys for this sort of stuff. Go after the marketing folks. They're the ones pushing these little monetization initiatives.
The art guys just do what they're told -- and there's a lot of overhead above them (managers, C level staff, who is beholden to shareholders and the board, etc., etc.).
Any devs that come out and say "X is going to cost you a raid tier" is putting their foot in their mouth, though. I can't say they don't deserve a flaming for that. Safer response is: "we can look into it, but we only have so much bandwidth".
A Farewell to Pre-Cataclysm Azeroth (video)