Now, this is pure anecdotal but every result I found on DDG was from a company that either advertises, consults about SEO/ads, is Google, or otherwise part of the ad scumbaggery somewhere in the chain.
The thing that got me was they all said ads are brilliant (I know, odd, isn't it?). They all had click through figures ranging from a few percent to 35%. Are you kidding me? A third of people click on ads?
I couldn't find anything that said ads are shit or dangerous or even anything vaguely negative.
Now, I don't see ads. Ever. I have UBlock Origin and privacy badger and other settings to prevent them from showing on my screen but the odd time I setup a PC and have to open a gaping browser, it's such an assault on the senses.
I've asked on here before but is there somewhere out there in the internet that I can see unbiased research on ads. Something! Anything at all?