Kagi users pay for repackaged search results from Yandex and other free search engines(with little amount of results coming from Teclis) Furthermore, kagi uses the results of Marginalia without contributing back to the code or even supporting the project financially.

If you want to pay to a search engine, just donate to any of the opensource search engines( Alexandria.org, Wiby, Marginalia, Stract or even Metager) you would like.

Finally I will end my comment with this : https://danluu.com/seo-spam/