paladin181: How do you prove a negative, especially on a DRM-Free game. Simply disabling or uninstalling Galaxy (or never installing it to begin with) makes it impossible to reliably track usage time. No, having a usage time requirement at all will not help much; people will find ways around it. The easiest thing to do is for customers to not act like entitled douchebags who want to "have their cake and eat it, too." But trusting people to do the right thing is a path to pain.
Without incidentally or accidentally opening up another can of worms? :)
There is software more accurately measuring time you actively play a game,
Gameplay Time Tracker for one. GOG could also ask for specific logs. While they don't give them precise data, knowing what to look for, it's easy to estimate time spent playing. Logs and screenshots can be manipulated at any time so it comes down to trust.
paladin181: If you played the game to completion and put in many many hours, it is only right to rescind the request. To request a refund the day after release is one thing. To still complain after it after you've decided the game was worth spending that kind of time on is disingenuous.
Of course and rightfully so. If there was a set amount of time within which you are eligible to request a refund, even 1 hour, would leave very short games dying by the roadside.
Even if there was one all one's got to do is pay, download, play and - within a day or two, request your refund. Being aware of the fact that it takes GOG a very long time to process it, one could keep playing and even finish a game. This is what OP seems to have done in a nutshell. Looking at it in a light most favorable to OP, they didn't try to get one over on GOG by exploiting their refund policy. Doesn't make his repeated requests after all this time look any better. ;-)