Keys stolen

this happens with stolen or fraudulent keys, happens on all platforms too, if a dodgy key was used to claim a game then they have the right to remove said game from the account, your only recourse is to contact the seller of the key.

G2A is known for selling stolen keys and they frequently have keys removed by the devs for being fraudulent. I would recommend buying your games from the Microsoft store and other reputable retailers.

it is possible, as g2a only hosts sellers and some of them sell stolen keys.

best to get from reputable retail stores or cd keys, humble etc. any sites that have varying prices are usually private sellers, they are the ones to watch out for.

some people got keys for steam on g2a that ended up being stolen, the account were fine they just removed the game from their library. but as this is microsoft then they would probably ban your entire life from the network.

please do not post your game keys online where they can be stolen

Once a key is activated it cannot be added to another account you would have to purchase the game again to add it to another account

Well it matters a lot which game key you buy and where you get your key from

Sometimes people just sell the keys included in their bundle (that's one reason why you can buy AC:Unity keys for 1-2$)

But there are also scams, stolen keys etc!

so at the end you got no guarantee!

i wouldn't recommend it