I personally ? would remove SEO-bias by first exposing the actual construction of the site without SEO add-ons, to some engine for consideration. A simple example would be "built with wordpress". Please note that it is wise to know that I do not know, many many things. So it becomes a networked endeavor, to find and identify "literal attributes" to sites for the use of the engine, not my personal opinion of what the web-o-sphere is in 2022.
A very very significant example is the primary language group exposed on the site.. for example, Cantonese ? I personally support the rights of "minority" languages like Gaelic and Welsh in the European setting, Tamil for South Asia, things like that.. make it so..
I agree, the ability to reliably filter out overly-SEO sites, copy-spam, and other search engine-bait would be a true game changer! Defining and detecting it is of course the hard part.
The advantage that Brave and co have is that SEO sites will largely not be willing to make changes that decrease their Google rank to improve their Brave rank. If Google changes their algorithm, everyone will optimise for the new one, but as long as the Google algorithm is there and the main priority, Brave may be able to extract some useful signal.
A very very significant example is the primary language group exposed on the site.. for example, Cantonese ? I personally support the rights of "minority" languages like Gaelic and Welsh in the European setting, Tamil for South Asia, things like that.. make it so..