Dungeons of Hinterberg - Steam key 98% OFF

The keys are being sold by users, not by the site itself so these kinds of sites are not that great to use.

Yes, Kinguin is a grey market site. In order to avoid a (temporary) ban from this site, I'd recommend closing this thread.
You'd have to click on the little green downwards arrow next to the big green button that says "Open" in the upper right corner of this discussion and choose to close it.

Of course it is.

Or did you think the prices are reachable with legit bought keys ?

A lot of curators sell the recieved keys or keys bought with stolen credit cards or stolen keys from hacks etc..

AND they must pay the fees, for bank transfers etc., if someone refund a game.
So they get double harmed, which hit small publishers and devs the most.