With Google's search engine making almost $200 billion a year in revenue, I'm not sure Kagi could afford what market rates would be here. They also spent billions developing the technology to crawl, index, and rank billions of pages, factoring that in, again I don't think a good price can be put on it.
What even is market rate? Kagi themselves admits there's no market, the one competitor quit providing the service.
Obviously Google doesn't want to become an index provider.