Don't know if this is still "Unanswered", but I just purchased Dirt 2 from a sister site (Steam Equivalent) a few days ago for PC @ $9.99 (steal of a lifetime, I'll say!). But, the best part was the fact that it was strictly to purchase the Software. After the transaction steam took point and I don't even remember the name of the website I bought it from. One (Steam) might even get away with claiming all responsibilities for the entire "third-party" transaction as if the outside site were a figment of the imagination.. just to paint a quick image. In a nutshell: The ending result basically feeling as if the whole process was done via Steam. Meaning- Nice, healthy trust and peace of mind.