Final thoughts on Cash shop.
1: It was pretty obvious they were going to do something like this, when they started selling Phantasia's.
2: It's not pay to win, so it shouldn't affect game balance much.
3: Right now we have three minions, and a mount. That's hardly a wide selection of cosmetic items.
4: They'd be pretty darn hard pressed to surpass the in-game vanity items in terms of sheer numbers, given that they, "NEED," to create gear every time there's an ilvl cap, or any time they create content they really want people to do. In a game without such a rigidly defined linear content treadmill, this might be a problem, but with said treadmill it'd almost impossible to see for-cash vanity passing in-game vanity.
5: If for cash vanity is lucrative enough, they can hire entirely separate model designers for it. In fact, if it is lucrative, they would almost have to, given that the core dev team is already pretty small.
6: If it's mostly minions, PFFFT!