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How about support better search engines instead?

It's usually better to support efforts that have a greater chance of succeeding, than supporting the ideal solution that is unlikely to happen.

...assuming "support" is a substantive action and thus a finite resource, and not just an upvote on a social media page.

Which are better in this regard?

Kagi imo, will be paid though.

And waitlist atm (which I'm on). Having to pay for a search engine would be a feature not a bug, IMO.

It is based on Google and Bing, so you will get the same spam results

Their selling point is that you won't. You will get a lot less results with it too. Liking it so far, can't say I've run into spam with it