Yet so many don't even want to pay 7 bucks for the shop by itself. If they can't even afford that I don't know what to tell people then.
Not an issue of affording. I've said before in various places I'd happily pay a "box" price for this game and possibly a subscription like standard MMORPGs if it meant 99% of the monetization/restrictions in player freedom were done away with. But not everyone should be forced to pay money just to use a simple auction house system with this being f2p.