Xorg is a fork of XFree86 which was made just because a relatively mild advertising clause was added to the XFree86 license. This resulted in the complete death

Xorg is a fork of XFree86 which was made just because a relatively mild advertising clause was added to the XFree86 license. This resulted in the complete death of XFree86. People really hate ads. With Adblock Plus, there has been no forking because it's kind of hard to tell unless you're paying attention that it lets some ads through. Either way, I think a lot of people have moved on to uBlock Origin. Don't underestimate the outrage caused by an ad where there was none before.