On your last point, you can check the usage statistics in your Kagi settings for the previous months. That way you can see if you would exceed the limits.

Apparently I search around 1k times per month, which means the new Professional plan wouldn’t fit my needs.

I decided to cancel my subscription, Kagi didn’t provide that much benefit over Google to me. I just needed this last push! I do think it’s a good idea, we definitely need more competition in this market.