I am a Kagi user and have been for 7 months now. I signed up for the 300 searches per month plan because I felt like that would fit me well enough and it turns out I average 87 searches per month. That’s a lot lower than I thought it would be by quite a bit.
I didn’t know if 300 would be enough, so I ended up with the Professional account. It was a good call as I hit 300 searches in a week!
That being said, Kagi is worth every cent, its search results are much better than many of the underdog search engines, and even out does Google for me on a regular basis. Kagi’s AI results are also really good and also cites its sources so you can fact check yourself. (I think Bing’s copilot does similar, but I wasn’t that impressed with it when I tried it a while ago)