Same here. I got God of War Saga and checked out fine using my PUR card and then when trying to get ICO/SotC and a $5 gift card with my PUR card it locked my account because of this.
Mass Effect 2 was one of the more enjoyable games I have played in my lifetime. It's definitely worth 10 dollars. ME1 was good too, but ME2 was definitely the better of the two.
Was gonna grab DMC4 at the 5 price point, but by the time I got home it was 10.
Ended up getting Overlord Complete, King Arthur Complete, and Torchlight.
Was going to bite on the valve complete pack I own most of the games in it, but I wanted to finish up the collection. Can't justify 50 bucks on it tho.