Kagi has a great source of "helpfulness" by looking at the "Domain insights" (as shown in the live stats). It would be great, if an aggregated domain rating based on user popularity could be shown in this popup:

That way I could better understand if other users deem the site trustworthy or not.
The rating could be calculated based on the blocked-to-pinned ration, taking sample size (and variance) into account.
The rating could be shown like in this quick mockup:

Maybe, with an additional tooltip, showing what it is.
Or just as a shade, representing frequency of usage of block level (some trickery would be required to get a good value for "Normal" as that is the default and would probably always be black, without adjusting the value somehow).

The shown screenshot shows a website with a website that the community rates as slightly less relevant.