I agree. StackOverflow historically had done a good thing with this I think. If you were signed in and have contributed so that you have a modest amount of karm

I agree. StackOverflow historically had done a good thing with this I think. If you were signed in and have contributed so that you have a modest amount of karma, you would just see sidebar ads. Which were almost always topical, minimally animated, and absolutely never in the way of the content. They set an example for the good parts of the web.