But in the case of affiliate marketing you get the links and as content creator you create the ad copy. What I was thinking was kind of an automation of these kind of posts: http://daringfireball.net/linked/2016/12/23/storyworth

Or some other way to deliver ads with copy and images, but through the backend. (that way the website author has complete power on what an ad actually can do on their website)

Affiliates work fine for E-commerce and performance advertisers that can track conversions. They work considerably less well for cost-per-click advertisers and brand advertisers because the advertisers can't trust the publishers either; there are plenty of spammy publishers who will send fake clicks and impressions your way for $$.

This is the major reason ad networks put JS on publisher sites. You can't give a website author "complete power" any more than you can give an advertiser complete power.

Awesome. I never thought of affiliate marketing as a model for all kinds of ads, but perhaps it can work that way. Is there any affiliate-marketing-hub or something like that?

The problem with affiliate marketing is that you must trust the advertiser in reporting conversions and paying. You can trust Amazon and some other businesses that way, but not a small business.

There isn't a "hub" per se, but it is a rather strong community. Most affiliates operate through the larger affiliate networks as a central location of advertisers, publishers, and tracking.

In most affiliate marketing programs the advertiser doesn't report the conversions - tracking and payment is handled by the affiliate network as an intermediary, which has it's own pros and cons. But they will fight for affiliates when commissions are due.

DM me if you'd like to talk more about that, I work in the industry.

Well, you can still track number of clicks by yourself to get a ballpark figure. You'll just have to believe the conversion number they tell you, but should be able to estimate whether it's realistic or total nonsense based on conversion rate.