One metric of "user friendliness" for websites (but also apps) is how much of the screen serves the user, and how much is adversarial.

For example, if the google results page is 1/4 ads and 3/4 genuine results, the score is 3/4.

This pages was fully covered in 3 layers of popups. So there were 3 screens of ads for 1 screen of content (well 3/4 of a screen, there was an ad at the top). So I had to figure out how to extend my computation to handle this case.

I think the score here is 0.75/4.25, or an 18% score.

That’s a new record!