Deleted

Normally the easy fix for that issue is to avoid creating level 0 public GAs.

You can already ask your winner to agree to a deletion, after which point you can put in a support ticket linking to that comment, and staff will delete the giveaway for you.

Beyond that, the only time either users or staff care about Not Activateds is if they're excessive in number or otherwise indicative of misuse of the site by the giveaway creator. Moreover, I've never once encountered a situation where someone lied about a key, and all other activation issues were resolved just by moving away from public giveaways (including unprotected invite giveaways and open group giveaways). From what I've seen, those elements are typical for SG users on all counts.

As far as your concerns on activations go, there's nothing you're bringing up that isn't already adequately handled by site policy and staff.

As far as rule-breakers not being properly restricted from giveaway entry, I believe the justification for that was that it was felt to be too much effort to oversee (since you can't fully automate the process, due to Steam's iffy reporting, meaning that any automation could at best only flag users for review). As far as cg not implementing a basic SGT-esque toggle for rule-breakers on public giveaways, that's associated with his general unwillingness to implement restrictions [not based on region or level] on public giveaways.

In short, if you want to avoid problems- be it from rulebreaking or nonactivations- make sure your giveaways are put into trustworthy closed groups or that they are covered by an SGTools filter. It's a bit awkward at first glance, but it works out rather well once you're accustomed to the setup.

If winners keep exploiting givers, they will lose the source of winning. I think we all understand it.

When someone mark as not received and You are SURE it was valid key, You start ticket. I had to do that once and the "not received" changed to 'received" after that.

Also You know. Sometimes people are away from their homes. If they are online and You know it, they should have a popup message on every refresh of the page that says they have win and the key has been sent. Just like the normal win message, but when the maker of the ga send the key, the popup will be showing up every time, til someone mark the giveaway.

I also had some bunch of old keys and they ended up being invalid for some reason. I asked people if I can delete, everyone agreed, but one never answered. I don't know if the person just ignores me and is mad that he won 2P giveaway and someone dares to ask him about deletion or what. Agree or not, there are some manners... to answer when someone is asking You something...

But except that two, I never had ANY problems and all my ga's are 0 lvl ones. I have (had) 6 lvl, so I have given "a few" keys (probably I reverted to 5, when some games changed its price... however I don't know how to check it...).

Depending on where you got your key from but normally you can ask a shop for a replacement key. The shop will revoke the first key and give you a new one.

This site seems to favor people that win more than the people who give. (strange as givers are what keeps the site going)
Example: If I give a key and a person wins and they use it on a alt account then claim the key was bad, I could get a "not received" that could hurt me entering future giveaways,

Yup, I agree the rules are a bit unbalanced in that respect.
Fortunately that kind of shit only happened to me once, so I guess most users behave correctly. Particularly if, as someone mentioned, you don't create level 0 GAs.

There's no way for support to check the keys, so it's impossible to have a 100% fair way of dealing with such cases, but that sort of behavior will sooner or later lead to the person getting banned.