While sad to see this, I think it was expected. I'm assuming GOG saw a lot of codes being bought from cheaper regions and being redeemed in more expensive regions. Probably some people made nice money on sites like kinguin and g2a. If the numbers were significant enough I doubt they had a choice. It's not just that they were loosing money, but how would it look to prospective new publisher signings?
And then if you take into account that, when people complained about scammers and stuff like that, the GOG staff suggested that less giveaways be made, I'm actually surprised they didn't do this earlier. To bad they did it in poor form and did not communicate properly. I don't know what happened with them letting TET go, but it's clear he is sorely missed.
Anyway, I'll enter my name in for Jade Empire.