2 Suggestions.

Well first one is..

Imagine a situation where you solve a puzzle and get a private giveaway link for valve pack ? But you dont have enough points, the giveaway is running for a week, so you have to put that link somewhere and keep it, like a .txd file or something. So it would be good if you could add a giveaway to your favorite?
Put it right here, it will be much easier to keep all the giveaways that you really want to enter but dont have points for it, in 1 place, it has happened to me a lot of times. So tell me what you think :P

Second is to make this button to open in steam program, when it opens in web browser, you have to log in every time and thats annoying.

So tell what you think :P