Hello Players,
I have recently banned 16.400 active Keys from use which have been surfaced on third-party market sites like the ones mentioned above. These Keys have been sent back from a Business Partner meant for destruction. By the time of this message, the keys have been banned.
Should you consider buying the key there anyways, remember, these Keys do not support the developer, and cause harm to the game itself. These sites act as platform for resellers and you can't say where said Resellers got their keys from, in this case stolen.
Resellers often try to contact Developers in hope of the ability to bulk buy keys in 10k packs. If the dev is okay with it, they can make quite a few quick bucks with. If the developer and publisher are excluded, then the game development suffers from that kind of theft.
See Games not just as a +1 on your Steam Library, see it as someone doing his best to cater to your likings. Please buy steam keys just via trusted stores. Currently Trusted Sites include Steam itself, Groupees and the soon to open Shop.playsirius.com.
If you feel you've been wrongly banned (Bought the Game with a bundle, but haven't activated the key yet), please contact me with your receipt at replacements [at] playsirius.com