Silly question, but want to verify. I assume if I buy a game (gift to myself). that key is good FOREVER until it is redeemed. So.... if I bought Alan Wake on day one of the sale for $15.00, I could gift the key a year from now and it would still work? Even if its not on sale at that time?
Yes, your key will be valid indefinitely.
I noticed you can't gift a game and buy it at the same time... so, can you buy multiple gifts of the same game before redeeming them? I.E. 576 codes for Thief?
Once you buy a game for yourself you can still add it to your cart from the gamecard and purchase it as a gift (infinite number of times even ;)