[marcosdumay]

It's ethical, so it won't backfire with the increasing share of savvy users. You'll probably have to ask for a lower price, but keep reading.

For sites you tell that it's ethical, like above, and that users won't block it because it's cached at your own server (you can do that because you don't track users). That may compensate for the smaller price. If it doesn't now, it will once more people start blocking ads.

For users you tell that it won't harm them, so they don't need to look into blockers (it will work if you take some effort to avoid malware too), and if they start blocking this kind of ad, you won't have any competitive advantage so harmful ads will win.