Some decent extraneous rules for giveaways?

I opened a support ticket asking for permission to have a few extraneous rules in the next giveaway I'm doing.

It'll be a pack of 10 games and set to be private, and I plan on having it open only for members of a certain group, and those joining must not have 3 or more of the games already in the pack.

I asked a few people in my friends list, and it seems most of them think that I should be a little more lenient with the rules. They think that I should make it so that people with half the games or less could join.

What do you think? First time doing one with extra rules, so I could use some advice.