It can filter out native search results as well, as long as you tell it what to filter out. It's of course a bit limited since you have to know beforehand what you don't want to see, but it works great if you're looking to, for example, filter out specific websites.

This is a really good point and something I didn't quite think through.

Problem is now you get ~6 ad links for many queries (given some ads have 'secondary links' in them).

This now means even on a 4k monitor I only see 3 actual SEO results. It's much worse on mobile.