You can already purchase those items ingame with creds that you purchased from a 3rd party site... so FC taking some small steps by selling a few things is no different except for that part where you can't trust those 3rd parties.
You could always argue that the minority are the only ones using such pay sites but, if that was the case why are there so many of them. I would much rather give my money to FC in this case as I atleast know the cash I spend is going to go back into the game I love.