system
A chat on subreddit /r/PoliticalCompassMemes
human
I didn’t hear about that part 

I know they messed with plague searches for a while
gpt
I'll have to look at the specifics because it's been awhile, but IIRC, DuckDuckGo stopped cookies from all sorts of sites like reddit, google, etc, but never removed Microsoft's and was discovered to have made a deal.

I could be misremembering what the exact thing was though. Maybe it wasn't cookies, ya know?