"If you want me to test your app(lication), pay me." - so-called "power user"

What many of today's software authors want/expect is free testing.

"To me, this seems to not just be admitting defeat, it's ensuring defeat right from the start."

While I do not use any of the example programs the mentioned, it seems like these environmental variables would be appropriate if the user wants to toggle between tracking and no tracking. However, for users who would never want to enable tracking, "no tracking" should be a compile-time option. It would not suprise me if that is not even possible with these programs. How is the user supposed to verify that "Do Not Track" is being honoured.