Thus, the expense of resources in creating a valid solution could deter malicious entities from attempting denial-of-service (DoS) or other attacks. Amazon, in the guise of its Amazon Web Services arm, has been rather active in the blockchain space. It claims to be simply responding to demand from its existing customers. However, thus far it has stopped short of cryptocurrency integration into its core business. From this, we can draw the conclusion that it is prioritizing the demands of corporate customers rather than end users. Towards the end of last year, it revealed two interoperable blockchain-inspired products, aimed at healthcare, supply chain, and other industries.
Source:
https://bitcoinist.com/amazon-files-proof-of-work-patent-using-cryptography/What is so clear with this development is that Amazon is working with the blockchain technology and experimenting how it can help in areas that it is concerned with. Essentially, they want the blockchain but so far not yet bitcoin as of this time. Amazon is pushing for the crypto but not the currency, as what the article above described this filing of the patent. Still, many are hopeful that soon Amazon can see the beauty of offering its buyers to use bitcoin.