You (and the ad networks) seem to be under the mistaken impression that you have some sort of a right to that information. You don't, and acting like a stalker should be treated as such.
As another poster said, you target your ads to the content it is being published next to. Seriously, can you not see the damage you're doing by pushing "surveillance as a business" model? If your hopefully-profitable idea relies on a key aspect basically every single dystopian story ever told (fiction and non-fiction), maybe that's a sign you should find another way?
The alternative, if you want to keep pushing stupid gimmicks like that "coupon" thing, it will just push more and more people into treating the advertising industry (and later, internet commerce in general) as the enemy.
That sounds awesome.
This is a very effective response by publishers because many users who would have enabled 'No Ads' simply will not bother to enable 'Do Not Track'
I'm not sure what the problem is - all they need is to ask the publisher to set the cookie for them. Then it's a first party cookie that is relayed on the back end to the ad network, who gets all the same information from it that they used to get.
Here's what it managed to get from my iPhone 6[1]. This would be the same 'fingerprint' as virtually every iPhone 6 user in the UK.