It's going to need to sustain that growth for a decade to be of any reasonable size. Google gets approximately the same number of search queries per day as DDG

It's going to need to sustain that growth for a decade to be of any reasonable size. Google gets approximately the same number of search queries per day as DDG has in its entire lifetime (~11 years). Edit: The problem in sustaining this growth isn't just marketing either. With increased traffic come increased server, maintenance, and engineering costs which may not be possible to support with untargeted ads as advertisers won't pay big money to show ads that have poor conversions.