Join Date: Feb 2006
Location: rural Indiana - IND
Programs: airline agnostic, Hilton Gold, IHG Plat, Jelly of the Month, DL defector, formerly NWA Plat (RIP)
Posts: 963
I have not purchased miles from any of the mileage brokers, but if you do there are risks.
As you said, it is against airline policies and if they detect the transaction they can (and will) close the account of the person selling the miles and cancel the ticket redeemed with them. If that happens, you are SOL.