The fundamental premise that enables it is the focus on the user. It allows truly wonderful things to happen in the product (and we sometimes forget that search is still a product). Aligning the incentives between us and the user (which is also the customer) is really freeing from a product management perspective.
We are still users of Google products - we utilize the paid search API for results and GCP for infrastructure (hello Google!). We think there are some things that can be built with these truly amazing assets, that Google's business model simply does not permit, and we are thankful for the opportunity.
In the meantime we also built our own index which focuses only on noncommercial content and are going to invest more in this direction in the future. We call it "the more humane web".
Another thing is that we do not need to get _very_ far in the market. There is no shareholder pressure, just angry (or happy!) users. This is not, nor will ever be, a Google scale product.
This is a paid search product of premium quality (or so I'd like to believe it is shaping to be) for a tight number of individuals (and families!) who are a little different and want something different for their search experience. Few tens of thousands of subscribers will make Kagi sustainable and I hope we will have what it takes to get there. That is all I can wish for right now.
Thanks for considering!