Based on their existing pricing at the $10 plan, that's 700 searches plus up to 400 searches at 15c / search.
Total is ~$16 / month depending on how many searches I make. The unlimited plan is appealing, but I'm convinced paying something in the range of $16-$25 a month ($192 - $300 / year, or $163 - $255 / year with their 15% annual discount) is still a steep price.
Sure - search is valuable, and ~$160 / year could work for me, but the variable nature of the cost is off-putting. Part of the issue is the per-search unit pricing: why can't I pay up-front like in the unlimited plan for a whole year, at the benefit of a slight discount? As someone who does pay for SaaS plans and is willing, I'm not excited about surprise monthly bills as an individual user.
My advice to Kagi would be to find a way to do annual billing without resorting to such fine-grained unit pricing. Charge per every 100 searches instead of 15c/search (e.g. charge $1.25 for 100 /extra/ searches on top of whatever plan I'm on), and have a rollover period (e.g. two months) if I purchase an extra 100 searches but only use e.g. 20 of them.
This kind of billing (annual discount for all plans + broader unit pricing) would reduce the price shock and anxiety of worrying about how much a single search costs.
I think Kagi can be an interesting product, and even one I probably will pay for, but the amount of thought into their current pricing seems naive from my view...