Well, because I tend to find crypto full of scams, and I think search engine that both blasts crypto in your face and is apparently based on it is likely to be built on a shaky foundation. I think decentralized search is likely to be slower, and very slow if based on waiting for crypto processing to happen.
To me, this is like walking up to a car wash that's proudly saying "run by Madoff". It doesn't matter how good the car wash itself is, I am concerned about it's long term viability and judgement vs getting funding from almost any other source.
Distributed is also very likely less private because you have to send the data to multiple places, or you have the issue of waiting for consistency across front ends. If it doesn't have multiple servers, then it's the backend that has to be distributed right?
Look, it might be a fine search, but if you doubt Kagi for needing an account, I would doubt this for the crypto association.