Earlier quoted context omitted.
Yet Kagi is doing well, and I'm very happy to pay a few bucks a month to be their customer instead of their product.
Kagi has around 200K subscribers. I wouldn’t call that “doing well”. Edit: that should be 29K subscribers
More problematic (for Kagi) is that it's not a free-standing engine (“Our search results also include anonymized API calls to all major search result providers worldwide” per https://help.kagi.com/kagi/search-details/search-sources.htm...), so it's still dependent on the weird business practices around non-paid search. I assume these other search providers wouldn't be able to provide API endpoints like this with just the business from API clients.