I noticed this on new releases, however after reading down further on the project page I see that there is a EULA that by installing you agree to. I had not seen this on other games and wonder if it is new thing? I buy things of GOG as they are DRM free, however this appears to be DRM, even though an agreement only not software imposed, I don't want to see this creeping in as the thin edge of the wedge so to speak. This is how it all started years back, these things popped up and then that didn't work so other types came in etc.

An EULA is not DRM. What on earth are you blithering about.

ETA: It's not "new", either. The very first game I bought from GOG was Fallout 1, way back when GOG was in beta. And guess what? On the very first screen of the installer is a requirement to agree to the EULA.

Agreeing to the end-user licence agreement is a standard thing for all software ever. Seriously, this has nothing to do with DRM and is not new.