Thanks for this thoughtful post. Not familiar with Kagi, but the ethical dilemma is old as the ages. Something is developed with the best of intentions, or at least marketed as such. It gains traction, and the idealism of the founders is tested over and over again with progressively greater incentive to join the dark side. Eventually the magnitude of the payday is just too great, the deal is struck, and "don't be evil" goes out the window.