I think that whether you thought it was funny or not is dependent on your perception of GOG in the first place. If you cared deeply about what they were doing and perceived them as the earnest underdogs, fighting against money-hungry publishers demanding DRM, then you likely feel that you've been taken advantage of.

I bought a few more games from them than I normally would, purely to show support for what they were doing. Now I feel betrayed, I don't feel like helping any more.