Greenlight developers have been giving away free games in order to boost votes on the platform.
Copies of Far Cry 4 that were downloaded and played before deactivation could be reactivated.
Third-party game key seller, Kinguin, made the claims in a statement on their website the other day.
EA have confirmed that Origin has been the source for some recent shady game key purchases.
G2A says it will compensate users that did not use their G2A Shield option.
Other publishers such as Devolver Digital have done the same in the past.