Origin is currently offering both Dragon Age 2 and Mass Effect 2 Digital Deluxe Edition pc digital downloads for $10 each. Combine that with the Origin offer for $10 of credit towards a December purchase for an excellent deal value. Considering that no digital download store can resist running a holiday-themed sale event in December, you may ultimately be able to snag 2 or more major titles for that initial $10 investment.
Unfortunately, I suspect that this sale is region restricted, judging from the "en_US" denomination in the URL. These sale prices on Dragon Age 2 and Mass Effect 2 Digital Deluxe Edition will last until December 25th, but the $10 credit-for-December offer only lasts until November 30th.