[Suggestion] Automatic entering of giveaways (read carefully before commenting)

I have an example. Imagine you see a giveaway for something you want but entering would cost you more points than you have at the moment. Then you take a look at your watch and remember that you'll spend the entire day hiking/in a plane/at a friend's house/dead.
My suggestion is some sort of automated entry, that you can set on a maximum number of giveaways (say 1 for example). If you MANUALLY use this for that particular giveaway, the site would automatically enter you if you got enough points.

Comments?

PS: Perhaps one per day or something.

EDIT:

Since a few things were unclear, I will give a more specific example.
Imagine you have 50P. You see a Skyrim giveaway which ends in 5 hours, Skyrim is 60P. You click on the "Reserve Entry" button, then you spend the day hiking in the alps. Meanwhile, Steamgifts waits until you have 60P, then it enters the Skyrim giveaway for you and takes 60P away. You come back and didn't win, but at least you got to enter.

MORE EDIT:

Suggested by Markers: Being able to use that entry ticket also for a "Giveaway starts in..." giveaway. Good idea, might as well be used for such giveaways.