I own all the Darksiders and they work flawlessly on 1909 with no issues.. I recently loaded them up and made a opening move compilation.
Trackers ok sure so install some add-ons. GOG has twitter, facebook, and twitch hooks as they say at the bottom.. they also connect to CDN for DDOS protections and google for analytics purely for site design.
As for ads.. what ads, attach a pic of one from gog.com. I dont even see a location for an inject in the code on a single page under the gog.com domain.
your spreading FUD, its not healthy.. if you dont like THQ Nordic thats fine, but as a company they have always been strongly against DRM and always for the people, the players and the recent injection of titles from them proves it!
I fully expect to see Destroy All Humans! here along with The Guild 3 and eventually Desperados III. They are amazingly talented and risk taking group of people and I love them for it!