This is their writeup on it, I think they get some kind of permission based on serving their ads but I'm not positive. https://help.duckduckgo.com/results/sour

This is their writeup on it, I think they get some kind of permission based on serving their ads but I'm not positive. https://help.duckduckgo.com/results/sources https://help.duckduckgo.com/results/sources