Oh, bummer. Well I guess that doesn't fundamentally change my point. Wealthy people putting in cash to buy PLEX to buy ISK to buy items from players who then sell the ISK for PLEX and then into subscription time are still not having to put their own cash into their subscription. So they still "cash out", it's just the amount is limited by how much subscription they no longer have to buy with their own money.
I think what it changes is constrain the laws of demand and supply and thus increase the risk of inflation from too much ISK being bought with cash?