Unfortunately, GOG is also notable for abusively incompetent support with 4 week turnaround on your first reply being normal to expect and I've got a support ticket that I gave up on getting an actual reply to after over 2 years of trying with repeated wait times of over 3+ (sometimes 4+) MONTH delays between replies.
And for shadowbanning game devs from updating their games without any acknowledgement of the fact that they're doing so, and their dev side support being just as bad as for buyers.