Imo ddg's mission is incompatible with today's web. The mission is simply to serve you regular Google/bing search, but without tracking and they do that well, but it is missing the absolute trash fire that those results are currently (yes, they have moved somewhat from that but clearly they are still heavily reliant on Google ranking). Kagi on the other hand, I spend 5$ a month on search that doesn't track me AND gives me great results. The open-source stuff (think of me when a bang now gives you https directly :D) is just the cherry on top.