They're literally taking on competition here.
Perhaps this is because I'm in Europe and it's faster in the US? A search request to Kagi seems to take around two seconds for me (shows as ~1s in the Kagi UI), it just feels really unpleasant compared to Google, I'm used to firing of a couple searches with different wording / terms and go through results quickly, feels like I'm being held back.
Maybe I'm spoiled, but if I'm paying for search I would really like it to be at least on par with Google, the search result quality seems ok from what I can tell, lenses don't really make sense to me, they seem to filter out too many results I would have liked to actually see, but the customization like adjusting the rating of individual websites is fantastic.
If they can manage to bring the speed to match that of Google, I'd be happy to pay for it I think.