Wow 6 years here and so less GA's joined. You have not used the site very much :o) giggling

When you want give it out to lvl 0 is it possible without problems.
Only use "invitation only" and Create a Forum Thread.
With this way a lot of the bots, autojoiners and other not so nice people found not the way into your GA's.
By this way i have no statistic numbers because i saved my thread with sgtools too :o)
When you use sgtools (sgtools.info) you can set rules. Partly set a hook, partly fill in 0.5 or anything like that and when you are experienced you can set custom rules where as example all that own CS:GO can't join your GA or only a fixed number can join your GA or only people with a wishlist smaller as 400 ... or whatever else... the possibilities are very high.
I can say the winners are then real players, no 7 days waiting on a hook, they found the word thanks and the work after the end of the GA is near zero.
I give my stuff mostly out to lvl 1, then i can set a real cv ratio rule too (in my case 0.5 = maximum won double of the given) :o)

ITH = https://www.steamgifts.com/discussion/g1nc3/ith2-nov12th-still-top-10-slots-to-fill
Here you can see how you can use Questions.
From "Are you a bot ?" Questions that can all users solve to Questions that nobody can solve ... you set the difficulty complete by yourself.

Hidden text/links, as example when you link a picture and the picture description shows the 5 digits of a GA (in your GA right now K2CzS)

jigsaw puzzle = http://jigidi.com/

Hope that helps. When you have more questions i try to answer them.