DuckDuckGo claims to be all for privacy. What it doesn't tell users is that it is just a wrapper around Bing search results. The $10M they plan to spend is just going to increase search traffic to Bing.
Before founding duckduckgo, CEO Gabriel Weinberg ran Names Database. Names database was a social media site that collected personal information much more aggressively than any modern site that I'm aware of. This information was sold happily by Weinberg for about ten million dollars to classmates.com (a particularly controversial subsidiary of United Online) just two years before founding duckduckgo.
IME, inline results from third party sites (like StackOverflow, images, youtube videos, etc.) are pretty easy to notice when they're included and easy to tell where they came from.