They're well on their way towards Google: https://mobile.twitter.com/yegg/status/1501716484761997318
It's come out later from comms execs within DDG that this is due to Bing following EU rules about down ranking, and the technical reason here is the least interesting bit. The impassioned defense of it by the founder and CEO is the troublesome part.
Solution: use Brave Search at search.brave.com.