Are invite-only links posted in group/whitelist GAs protected against leaks?

I know they can technically still be leaked, but can I ask for reroll if the winner is not a member of the group? The reason I'm asking is because I plan to create group GAs for a few unbundled games, but some of these groups don't check for history of rule breaking. No fun in giving expensive games to someone with many unactivated wins...

Here's a little something for your trouble...

Update: Let's do it. If you happen to be able to access this whitelist/group GA for the game Fire, you'll find there an invite-only link to a GA for Firewatch.