Where can bitcoin buyers get these USD cash codes, and how do bitcoin sellers convert these cash codes into fiat money?
There will be a directory of users buying/selling cash codes for cash. Users can also refer friends and family and sell them (or as a gift) the cash codes for fiat (therefore getting commissions from the fees two levels deep). Members can also sell the cash codes online for BTC or for products/services, users can also withdraw BTC and sell them offline or through an exchange. I just don't like the idea that any government or company can change the fate of a bitcoin exchange in a blink of an eye.
The question was "where". I want to buy bitcoin bitcoin from your exchange, who do I give my fiat money to get a cash code? Some stranger on the streets or web who gives me a chain of numbers?