The idea behind Ads.txt was simple: publishers create a public list containing the names of all the partners they work with, and buyers check that list before they buy. But even the simplest of ideas can get complicated when they go from paper to reality.
Some publishers just said “yes” to every request to add vendors to their list, while others did remove partners from the list, but then continued to work with them.
In this way, publishers can amass thousands of lines of text, which is the opposite of simple.
