I can see why Blockchain Books may include one or two Amazon links (though not everything being a link to Amazon), but why is literally every so-called "resource" under Bitcoin and Ethereum and Smart Contracts also simply a link to Amazon?

A quick Google brings up results like:

https://souptacular.gitbooks.io/ethereum-tutorials-and-tips-...

What makes your list of Amazon links better than everything on that page? Have you even read and/or reviewed all of the books you're linking to? If not, why are you recommending them to other people?

Why is your list of Amazon links under "Bitcoin" better than something like this (found in a half second Google):

https://github.com/solocshaw/Bitcoin-Resource-List

Which somehow manages to contain zero Amazon links, even under Books, which links to the free Github hosted version of Andreas Antonopoulos' Mastering Bitcoin: Unlocking Digital Cryptocurrencies, unlike your list which, like most of the other "resources" you list, simply links to Amazon.