https://duck.co/help/results/sources https://duck.co/help/results/sources Money quote: > We also of course have more traditional links in the search results,

https://duck.co/help/results/sources https://duck.co/help/results/sources Money quote: > We also of course have more traditional links in the search results, which we also source from a variety of partners, including Oath (formerly Yahoo) and Bing. The other 400 sources are just used to widget stuff while the organic links are mostly from Bing and Oath. So it's a mash-up.