I think the 3month rule is a better solution actually, as it rewards people that have been helping the community for a while now, not that just bought a few bundles in a hurry to reach the status.
Raising the game count to what? 50? 100? At some point you're doing giveaways for a handful of people, and by then you might aswell just gift them directly. Plus the fact that usually those actual "megagivers" (Koalaking, InferiorMKninja, Frosty, Smileygolem, etc) are people with 1500+ games who probably aren't entering most of these giveaways in the first place.
Except, you know, when it's original sin... That one should be restricted damn it, bastards
I've actually yet to enter a single giveaway and probably never will.