Doesn't CC actually beat a price, not just pricematch?
I think (but could be wrong) that is only if you already bought it at CC and then brought the add in later (up to so many days later.) I think they give you back 110% of the difference. Otherwise, they just match it on the spot.
On a $50 game that you can buy for $35 elsewhere, they would give you back $16.50 ($15.00 + $1.50 (10% of the difference)). It's probably easier to just get them to price match up front (like I did) then come back later and get your extra $1.50. Probably cost more than that in gas...