Bought keys already activated

Are you sure you hadn't used those keys already? There have been multiple times users were sure they revealed a key a long time ago but Fanatical's unrevealed thing might be... not correct at times.

I'm not sure if Fanatical assigns you keys right when you buy it or only when you reveal it. Humblebundle doesn't assign keys until reveal so key is fresh on reveal, not sure about Fanatical.

You can create group giveaway for groups down below:
https://www.steamgifts.com/group/OZCha/dgikinw
https://www.steamgifts.com/group/aaQSf/lootboysg

possible that they resell keys if not activated during a year or so.

umm, can you point to that?

Probably not your case - but I had weird situation on HB. I checked old bundle that I was sure that I redeemed half of it already and it shows all keys as unrevealed. When I revealed one of them and tried to activate it - it told me that it was used..
But then I refreshed page and half of games suddenly were already revealed.
Checked it later and apparently it was me who revealed them xD

Idk what was that. Something with cookies? Anyway - it happens now and then. So I make sure to refresh page before revealing old key xD

I had bought an indie game key from Fanatical, maybe 6 months ago, to gift on Steamgifts. The key turned out to be used (very, very unusual as Fanatical are reputable). I assumed that I had gifted it maybe, and been sloppy with my record keeping. I told the winner I would buy another (key was not that expensive) and gave it to my winner. Second key was also showing as used. My winner was being patient - I told him I would contact Fanatical. End result is Fanatical pulled the game from their sale listings and refunded my last purchase of that key. So ... I assume the dev did the wrong thing and inactivated some older keys (or reused them).

So any owners of keys for that particular game who have not yet activated them (if bought from Fanatical) will find they will not work. Game in question was Across the Moment.

One of the things I do if gifting from a bundle is check the Steamgifts page relating to that bundle. You will often find that other buyers will note if there are issues with keys. I currently now try to have keys no older than about 3 months. Avoids issues if gifting.

BTW also contact Fanatical and ask for a replacement key.
I've had bad keys replaced by Groupees and IndieGala as well.

Humble Bundle is a pain in the ass though, they put you on a blacklist if you even mention steamgifts.

This happened to me once, but i was the one that won the giveaway and the key was activated already, i contacted with the creator and he said me that the key was from Fanatical and i was the one that wanted an extra copy of the game. At the end of the day 1 week later he didn´t gave me a replacement so i had to buy a copy myself to mark the giveaway as received.