I think what a lot of people aren't realizing in this topic (as long as it has been going) is that coinbase and circle show up as a bitcoin provider. There are rumors about mentioning bank accounts getting closed without warning if you are caught 'dealing' in bitcoins (pffft). Circle will only give you a max of $500 instant CC transaction a week and Coinbase only $1000 per week. Many folks want to mask the transaction but still want to get the instant transfer with no fees and not worry about the banks cracking down on BTC's popularity.
I sell on LBC and buy on it, as well. It is pretty much the only game going where your fees are minimal due to competitive vendors.
SpareBits