Since the NSA "Muscular" program was known to have compromised datacenters upstream, that's little consolidation if DDG has any multihomed datacenter support an

Since the NSA "Muscular" program was known to have compromised datacenters upstream, that's little consolidation if DDG has any multihomed datacenter support and is not encrypting their inter-DC links or if the NSA has compromised your hosting provider directly. Given that they have been shown to actually intercept and plant modified hardware, there's really no guarantee that they couldn't plant a tap. Point is, if DDG ever got a non-trivial marketshare, there's little confidence that your systems are more secure than Google's, regardless of capturing search history or not, or if they could not be compromised by the same court demands that other top level providers are under. DDG's safety from the NSA is inversely proportional to its success in the market.