Reroll

No, not really. You can chose to NOT give him the game and get a "Not Received" in return but there are no rules that allow rerolling based on subjective matters such as "he has't gifted enough".

No, there is list of things that allows reroll and 'leaching' isn't there.

I won't elaborate on ratio, because I think it was already discussed many times, but if you want to share games with people who also share, just raise level in public GAs. From level 3 or 4 you should be good.

EDIT: Or you can check their profiles for things like regifting or not activating games, and then ask for reroll. That way you will have bigger chancess to have it accepted.

Poor ratio is not grounds for a re-roll. The best you can do is to either blacklist people you spot who have what you consider poor ratios, or increase the level requirement for your GAs if you want to prevent people who hardly give anything back from entering your GAs. Neither method is great though.

I triple checked them for that and they seemed 'clean' -.- I already set my GAs by my own level to avoid bots and to incite other steamgifters to raise their level. So it looks it's the only thing we can do.. Oh well thanks guys.
Edit: Good idea about the blacklist though!

Set the contributor level requirement fairly high. 4 or 5 pretty much guarantees that the user has given away a fair enough amount of games. Of course, that doesn't mean that the giveaways aren't all for private groups or private, but I still thing that any giveaway is better than no giveaway at all.

I tend not to care about ratio, because it's mathematically impossible for everyone to have a 1:1 ratio if even one person has a ratio better than that. For every person who gives more than they win, there's also at least one lucky person winning more than they give.

Never gonna give you up

No. Maybe increasing the level would work for you, i guess you prefer giving to new users that haven't really won much, but the reality is that the majority of users are lvl 0, no contributors.
Personally i still prefer making low level GA, as an incentive to play a part on the site, even though those GA are more of trap to find rule breakers :P
Maybe you could try that, check their profile for unactivated games, or multiple accounts

Bleh, don't want a 1-1 ratio at all, really. But when you see on a profile '47 won, 1 sent' (veridic!) it's ridiculous. Or you see a full page of group giveaways and nothing else. Really, it's disheartening (is that a word? lol). Great idea Fnord, went thru all my winners to check them and blacklisted like 5 already. Feelin' better ^^
jbondguy007 good idea too! But can I set a GA's level higher than mine? Is there a limit to that? I'm only level 2, can I set it on 4 and still access the page? (that would be major fail if I can't access it again..)

Not everyone is here because they can give out 9000000000000000000000000000 games because they rich, most ppl. are here because they can't afford\barely afford anything.

Im only able to gift games from steam. Which resulting in regional restrict and its quite difficult for me to gift games ><""

you can post in the forum and not made public.
or made a puzzle. although there are a lot of lurkers...

Rerolling isn't for when someone doesn't meet your personal standards, so no.

If you'd like to restrict your giveaways to people you deem worthy, you can do whitelist giveaways. To fill up your whitelist, you can make a thread asking for people to sign up, and set a list of requirements (must have at least x:x ratio, x level, all giveaways sent/received, etc). When people post, you check their profiles to see that they meet your standards, and then add them to your whitelist. Another criteria that's game specific I've seen is that they must have had the game on their steam wishlist for x amount of time.

I guess not everyone can do many giveaway, because maybe they like me have a poor wallet! ;P
So, if you don't want those people join your giveaway, you just make a high level giveaway. You shouldn't use 'Request New Winner', i think it's not fair.

Go on a blacklist spree.. problem solved (@=

-Moans about people having too many wins in comparison to given away.
-Has 46 wins
-Has 18 Giveaways.
-GG

If you really want to select a winner with good ratio, you should at least write your threshold in the description.
If you didn't, you better give him/her gift, unless the winner agree to reroll.

Of course, the best way is to create a whitelist giveaway next time.
For example, make a post and say "I want to do a giveaway for people who has good give/take ratio. Left some messages here, I will temporarily add you into my whitelist."

All right how can I check for regifters if their profile is set to private? Insert random GIF of facepalm here.

upping the lv gets rid of most leeches. you can also blacklist users you don't want anymore on your ga after they win or enter (you will have to spend some time checking everyone).

Build yourself a whitelist...more work but it's the optimal solution.