TDD & Penumbra Being Removed From GOG by September 2nd

[Lebostein]

The price system on Humble is also different. If I would purchase "A Machine for Pigs" on Humble Store, I have to pay 17.49 €. If I use the Humble-Widget on http://www.frictionalgames.com I have to pay 20.00 $ = 15.81 €. What is going wrong?

PS: Steam is a big fail. I would never purchase a game on Steam. Now you can see, why. If someday FG decide to remove their games from Steam (from whatever reason, no one can know what the future holds), you lost your games. Please com back to GOG. That's childish!

@Frictional Games:
1. Why "A Machine for Pigs" is not removed from GOG.com? Please remove "A Machine for Pigs" also, otherwise your action is not credible. Be consequent!
2. A very important question for costumers of Amnesia TDD on GOG: Will FG continue to upload updates to GOG.com?