As most business's their internal code is probably a giant ball of mud that runs on caffeine and poor amounts of sleep. It works, but it probably wouldn't be reasonably releasable without refactoring and reworking a lot of the source so that it's componetized in some way.

Personally I just want DDG to make a search API that is free and doesn't require API keys. That way I can setup search in mobile or desktop apps and have it automagically be searching through specific sites like Soundcloud and Youtube and such.

Like if they're reading this, DDG is very unique and if they were to focus upon reducing costs, making efficient software, and better algorithms, DDG could be the service we shove into apps.

Their selling point is trustworthiness, privacy and usefulness. To be useful, they must have quality software/IP. And in their opinion, that should be protected.

So let's say they release their source code - how can they possibly prove that their servers are running that same code?