I was using DuckDuckGo and it was giving me pretty 'eh' results, only marginally better than google on the surface level, but both weren't really usable for deep older searches. (and ddg starting to add sus ads/promoted) Brave is better, but Kagi has been fantastic when I've really needed to find something specific, technical, or very old. I think the best way to come about the pricing structure and limited search results is that I think it's not supposed to be your only search engine from then on. There are times when you need what kagi gives in terms of producing quality and relevant results, and times you just wanna search "[company name] reviews/is a scam?" that using kagi wouldn't serve you better than anything else, so it's more of a tool that you bring out when you aren't finding what you need with free search engines. On it's own page it doesn't try and oversell you on it, they admit that the majority of people don't need paid search most of the time.

I haven't approached if it's an early netflix thing where you could split the bill with others for one login/family plan, that might make it more feasible.