This is a completely an excuse - advertisers would have looked to anything to disable and ignore DNT - "oh, not enough users use it for us to justify enabling i

This is a completely an excuse - advertisers would have looked to anything to disable and ignore DNT - "oh, not enough users use it for us to justify enabling it" etc. The end result of DNT was never going to be "advertisers were going to less ruthlessly track you" - that's a fantasy.