I pay with a crypto account and a dedicated email account. In this world you make your own privacy, everyone is out to get your info. Yes, they track my search trends and likely don’t do anything too nefarious with it now, but it’s only a matter of time before they do, but my trends in that account is all they will get and since there are no ads and I can play a part in content filtering and prioritization on Kagi, I am far less a victim than many other platforms.