Same here. Pretty lopsided poll, not sure it's really designed to come out with any answer different than the OP wanted to get.
On topic though, I agree about an in-game store. It's a premium service, people are buying convenience.
I see it as a great way to put hackers and such out of business, always a good thing to protect our accounts and get them out of our hair.
So no, I wouldn't quit. Technically I couldn't quit since I'm already unsubbed and probably will continue to be if the next expansion is Burning Legion again. But if I did decide not to return, it wouldn't be because of an in-game store.