Steps to reproduce:
Search for !$
I actually expected to find results about the bash bang dollar syntax (https://stackoverflow.com/questions/41385015/what-is-bang-dollar-in-bash), but I guess getting results about stocks would also have been fine since !$ seems to be a kagi search command that I wasn't aware of. 😀
Instead I found myself on stockflare.com with a message "It is with heavy hearts we inform you that in accordance with paragraph 12.1 of our Terms of Service, we have unfortunately taken the decision to discontinue the service."