I use Ecosia (which Bing powered) and wondered why it was down earlier. Makes you realise just how few players there actually are in the search rankings space.
I believe you.com has their own proper search index? Ecosia and duckduckgo exist purely on ad revenue, any good search engine will be paid for in the future, even Google’s non-ad search results make me hesitant, it’s all SEO spam now, plus chatGPT or Gemini can answer nearly any question when you pay for the real service