[prophesi]

They list out their reasons here https://seirdy.one/posts/2021/03/10/search-engines-with-own-...

Sounds like two were excluded for having a far-right focus, one for crypto payments, and the rest for being small/simple proof-of-concepts

That said, I would also be interested in what engines in particular were excluded, with a small blurb as to why it wasn't included.

[kjrose]

Precisely. I don't care the reasons. I would want to know what they are.

I absolutely hate when people claim to be providing a "complete" list of something and then skip things because 'reasons'.