[bla2]

That links "more than 400 sources" to https://duck.co/ia which in turn links to https://docs.duckduckhack.com/#improve-a-live-instant-answer saying "DuckDuckHack is in Maintenance Mode". But https://docs.duckduckhack.com/welcome/how-ias-work.html suggests that these sources are for things displayed at the top, which I see super rarely.

Yahoo gets their search results from bing, so that's the same thing. So this supports my claim.

[cpeterso]

DDG also uses Yandex and Baidu search results in relevant regions:

https://thenextweb.com/apps/2013/09/26/dolphin-browser-goes-...