I think the main point is to not try to copy Google. DDG is power users' search engine for now, and that's OK. You may leverage power users help in tags, and other features, that would minimize the overhead in hardware platform. To make an extreme example - imagine how many data about the particular user would you need to have and how many resources would you need to spend on AI models training to give the same result by guessing and AI that user would get from SQLite, having formulated simple request in SQL.
I'm really confused here. Earlier you were asking why open source couldn't build web search, like it built Firefox (sort of); and now you're saying just use Google? Open source can build a page that just uses Google, but that doesn't get you off a dependence on Google.
Why do you think the search engine is unable to build a model leveraging a huge number of free developers?