Do you have any evidence that they collect your data?
They go so far as to have an API to generate cryptographic proof of subscription tokens without revealing your identity for searching when using Tor, etc ( https://help.kagi.com/kagi/privacy/tor.html ).
Beyond their data collection stance, which I believe, their results are better and worth paying for because they don't have all the extra ads and crap shoved in them and allow you to modify your own website rankings, etc.
First of all I have to ask: Do you work for them? Be honest.
As long as I cannot access their data, cannot see their systems on a continuous basis, they can collect my data. The same applies to DuckDuckGo and the same applies to VPN services.
So at Kagi they are aware of Tor, they are aware of the Dark Web. If you even talk about this on your website, of course you find ways to circumvent privacy there.
I tested Kagi and my experience is the results are even with or worse than what other services present like Google or Bing or even Perplexity. And if you don't like advertising, just use an ad blocker. I'm so surprised that so many people don't seem to do this and they always complain about ads. Just use an ad blocker already.
So they allow me to modify my own website ranking. Well, if almost nobody uses this website, that's pointless. Besides, if I could modify my website ranking, so can everybody else. And now we are back to search engine optimization.
Nope, I'm completely unaffiliated with Kagi, just a happy customer for a year and a half or so.
I don't understand all of your objections, but it sounds like you're operating in a very strict "if I can't verify it myself continually, then I don't trust it at all", which I think is far too black-and-white. Trust exists on a scale, is built up slowly over time, depends on your threat model, etc.
I don't want an adversarial relationship with my search engine where they try to show me enough ads to make money to stay afloat and I try to block enough ads so my experience isn't miserable - this isn't any fun, and one of us will lose.
On the other hand, I can pay Kagi, and they are incentivized to give me the best service possible so that I continue paying them and recommend them to others. It's far more positive, and a better outcome for us both. And it's working - I have a much better experience on Kagi than Google or elsewhere, and I have kept paying them and recommending them to others entirely organically - I don't think there's even a referral program, I'm certainly not using one.
They say they don't collect my data, and why would they? They don't show ads, and if anyone ever found out they were lying their paying customers would leave in droves. Furthermore, they take actions to back up their claims, like integrating the Privacy Pass feature.
Finally, they don't allow you to modify your website ranking for others - they let you modify how other websites rank for you. You get to personalize how you want websites to be ranked for you when you make a search, which is a very cool feature.
Anyway, if you tried it and didn't like the search results, no problem! You can use something else. I don't think that your other objections are valid, though.
They go so far as to have an API to generate cryptographic proof of subscription tokens without revealing your identity for searching when using Tor, etc ( https://help.kagi.com/kagi/privacy/tor.html ).
Beyond their data collection stance, which I believe, their results are better and worth paying for because they don't have all the extra ads and crap shoved in them and allow you to modify your own website rankings, etc.