Take a peek through Kagi's early blog. Besides its founder holding some odious views he is regularly called out on, Kagi was meant to be an AI company from the beginning. The plan was for the search to exist to provide training data for the AI, which would then be sold back to users. They serve Google search results in the end if memory serves. Not a durable, trustworthy alternative to Google, in my estimation. I certainly wouldn't pay them.
See https://chaos.social/@scy/111704636274463611 and also https://d-shoot.net/kagi.html