If you search for a term on DDG:
https://duckduckgo.com/?q=asdf
and then click on a search result, you will notice that it goes through a redirect:
https://duckduckgo.com/l/?kh=-1&uddg=http%3A%2F%2Fwww.asdf.com%2F
Why does DDG do this? And is this a privacy concern?