Looks like some of the shady players in adtech (a large group from which to choose) are resorting to social engineering to get around ads.txt. What should you add to ads.txt? Nothing.
By the way, I think an ads.txt file can be a sign of desperation and point you to sources that you should monitor for fraud more carefully. Check out Salon.com‘s. Wow. As I write this, even the hinky Thrive Plus is in there.