After years of shrugging off claims it sold stolen keys, grey-market reseller G2A has admitted to shifting copies which were "illegally obtained"...
https://www.eurogamer.net/articles/2020-05-21-g2a-admits-it-sold-stolen-game-keys
https://www.eurogamer.net/articles/2020-05-21-g2a-admits-it-sold-stolen-game-keys