In that DuckDuckGo gives your search terms to Bing (I think they also had a deal with Yandex for russian queries, not sure if that's current) and receives the search results back and displays them. (adding its own quick results and ads)
They have their own crawler as well, and there are a bunch of other sources depending on what you're searching for. Bing results are probably a larger part of it at the end of the day, but it's not quite as you are alluding to.
To me that page always reads as if it tries to play up their own contribution, which until there is more detail makes me suspicious if the main results are meaningfully influenced by them, or if it's "just" infoboxes etc.
Maybe, but I also think basically saying "well, it just spits out Bing results" is over simplifying. There's probably somewhere in the middle, as I said, I suspect Bing results are a pretty large chunk of it but I also try not to just hyperbolically state things ya know?
I don't believe "it's bing results with added extras around them" is hyperbolical, given how similar DDG and Bing results look everytime I try it. If it's wrong, DDG would IMHO do themselves a favor by sharing more details here.
How so?