I'm using Orion trying out the product. I am not signed in to Kagi yet and expected my searches to run out at some point, but eventually noticed that every time I search via the address bar, the number of searches is stuck at "1 of 50" and never increments:

If I go to kagi.com it shows that I've used "-109 of 50" searches:

If I search and go to the 'images' tab it'll show a different number again, and clicking between tabs will give inconsistent numbers:

I'll take a wild guess and say I've exhausted my free searches.
I expected to be blocked from continued searching, this seems like a bug that may be preventing subscription prompts.