Under that example (three $40 games) it ends up $40 + $40 + 0 ($15 after used coupon) so you waste your B2G1 because that lowers the amount of the game an it automatically becomes the free one. Only way to get value by stacking coupons w/ B2G1 is to use a coupon on a more expensive game
Thanks for clearing that up. Now to figure out how I'm going to use these certs. Anyone know if the B2G1 will be in store aswell for Cyber Monday?