I'm sure GOG are legally covered in what they're doing (it's also not the first time, they had a dispute with bethesda over unlisting the classic fallout games

I'm sure GOG are legally covered in what they're doing (it's also not the first time, they had a dispute with bethesda over unlisting the classic fallout games for years). Blizzard's given them a termination date of the 13th, so they're allowed sell until them, and probably contractually Blizzard had to give them some amount of advanced notice.