Yes, I can understand that. But on the other hand I also know that sometimes there are various reasons keeping someone from accessing SG or Steam, so they can't possibly try to activate the key immediately to see whether it works. ;)

I contacted some winner via e-mail before if they didn't activate their key within 3 or 4 days, but that was mainly because I still had a very limited amount of GAs that were allowed to run at the same time and these people kept me from creating new GAs. By now my limits are high enough not to bother me (since I don't plan on making 30 or more GAs at the same time anyway), so I don't really mind. :)