Isn't the whole point of DRM-free that people who don't pay don't pay and those measures hurt legitimate customers the most? Especially for PC games, piracy is extremely prevalent no matter which technology is used.

Of course, Linux users might pirate the games, as do Windows users. I am purely talking about legal rights here. I have to imagine there are quite a few developers with a primary Linux PC who are much more inclined to purchase a game if it doesn't require pulling out a special purpose Windows machine or dealing with an unofficial hack that barely works. Maybe those potential revenues don't justify the high costs of changing some compiler flags to CDPR.