I thought DDG already crawled their own curated list of sites?
There is a DuckDuckGoBot and I think it was an interview or podcast Gabriel did a while back that he mentioned they use it for filling out gaps in the Bing API data to provide the instant answers, favicons. Their preference for the instant answers were authoritative references such as docs.python.org. This would have been a while back though.
If memory serves, those crawls are only used for Instant Answers. My interpretation of the blog post is that it would be nice to have a search engine that's sort of a hybrid approach based on Instant Answers for the whole web.
There is a DuckDuckGoBot and I think it was an interview or podcast Gabriel did a while back that he mentioned they use it for filling out gaps in the Bing API data to provide the instant answers, favicons. Their preference for the instant answers were authoritative references such as docs.python.org. This would have been a while back though.