Same here, the only thing this news does is making me aware which devs to avoid in the future. I see no reason to support someone who treats their paying users this way.

As for GOG itself, they actually started taking this issue seriously and are actively working on getting the missing updates and content on the store. Here is a forum thread run by GOG team member with updates about what they managed to hunt down. Progress is slow but hopefully they’ll be able to reach parity for most (if not all) games eventually.