HypersomniacLive: I don't think that it has anything to do with all that. I was following their Kickastarter campaign to back them, had an endless back and forth with them about a few things, including DRM-free as they initially has only Steam for PC, and added DRM-free after people repeatedly asked for it.
And when the time came, they delayed it for a very long time while backers and others poked them constantly.
Seems they're doing the same now using the "it got pirated a lot after we released it on GOG" excuse.
I find their statement odd about the game being pirated. It implies it was pirated before the GOG release. And since it's a digital item, once there is
one pirated copy available, then it's out there and available to anyone that wants it. If it was already pirated before the GOG release, then it was already available to the pirates. To then note that the DRM-free GOG release induced a spike in pirated copies would only seem to indicate that the game came to the attention of pirates again and they decided to grab it at that time.
So I wonder: do they really think they'd have sold all those post-GOG pirated copies if they'd decided not to release on GOG at all?