I've used Kagi the last month and was quite satisfied.
But the payment model (not the price) is completely PITA.
I did a pre-payment of 15 $ via PayPal. First this options is extremely hidden.
Second after I reached the limit of searches for the month, I could not get additional searches for the month, but had to wait for the next. So I was blocked with searching and I moved back to Google. My left-over 7$ are rotting there now.
Because some people prefer Pay-Per-Use rather than yet another Subscription. I am one of them; even my cellphone plan is Pay-Per-Use which can both be cheaper or more than a subscription, but in both cases I am in the driver's seat.
But adding credit to a wallet is not pay per use. Utilities like electricity are pay per use. I also prefer that, but I don't want to randomly guess how much money I need to put in a wallet for a service