you misunderstand the point.

its not an open group. only those on my white list are invited.

last whitelist giveaway (monster hunter world), i wrote something in the description, saying that i wanted the 50euro game to be played (a week after release, so no discounts anywhere), and to leave a comment below, if you read and understood those rules...

instead a few auto-joined, did not read, did not comment, and farmed the game for trade cards. in accordance to steamgift rulez, i was not allowed to request a reroll

now if i use the group for my whitelist giveaways, i can prevent a good AA game going to somebody who doesnt deserve it, cause i can kick someone out, and can proof to steamgifts he is no longer part of the group, there for i can request a reroll...

joining only benefits you if you happen to be interested in good games, often not yet released as bundle or even seen a discount.

if you decide not to join, its all oke..., no hard feelings, but i will remove you from my white list
(sadface, you are barely 3 months on it -- small list -- 66 members)