If you look at the "About Us" you'll see two folks listed, one of who is obviously a FlyerTalker (since his handle is his name), and the other is also a Flyertalker that I know of.

They are obviously "arbitraging" the Radisson/Valumags promo since you can buy miles from that at .76 cents/mile (when you use a 15% off coupon) and they're selling them for 1.5 cents/mile, so they're making $744.44 on a 100,000 mile transaction. Of course there's overhead, credit card transaction costs, etc, but they should still be clearing a nice chunk of change from each transaction.