Ubisoft deleting resold games from Uplay

Ubisoft seems to have started deleting digitally bought games from the Uplay libraries of some users as their codes had been bought via cheap resellers like G2A. This is made apparent through comments from official Ubisoft forum, where users moan about their vanished copies of Far Cry 4, Watch Dogs and Assassin's Creed: Unity.

Ubisoft starts following a behaviour where publishers identify codes from these cheaper outlets and then ban them. Exactly where these codes come from remains a mystery, but they were likely either given out as promotion or meant to be sold to regions were prices may be lower. There is no official comment yet from Ubisoft or any of the resellers.