Probably because it costs money and it also likely also will quickly succumb to sloppification by experimenting with their own ai and having an unstable founder…
I'm using it for about two years and i haven't seen any sloppification. I see it as a feature that it is a paid service because i hope it will be a sustainable model for them to keep it as it is. I think it's a no brainer to pay for it instead of all the suffering people describe here. The founder remark i don't get
Right now Kagi is a better search engine than Google. Why should some eventual demise in the future discourage anyone? There is no cost of switching and you can start using it right away