An unexpected side-effect for me after I started subscribing to Kagi a few months ago, at a low tier with limited searches, is that I made sure to configure all my browsers with keywords for Wikipedia searches and I use those a lot, knowing that what I will end up with after searching is probably going to be the Wikipedia page anyway. No point wasting precious limited monthly searches.
Kagi does not count bangs as part of monthly usage - for wiki that would be !w search term
https://help.kagi.com/kagi/plans/plan-types.html#how-searche...
I'm still puzzled after all these years : why would anyone use search engine bangs instead of directly configuring custom searches from their browser's URL bar ?
It takes a bit of effort to add all you would want and, for me personally, bangs can be anywhere instead of having to be at the start of a search query as is needed for custom search keywords.