Bill, I can tell you that the 3rd party insurance company that warranties the Amazon stuff is the same one that warranties the stuff you buy at Lowe's.
The stupid reason I know this is that my cousin worked for them for 4years. They are a massive company that has an office in Nashville, Ashurian? The spelling alludes me.
They insure anything that they can get their grubby hands on, run call centers, and buy smaller companies.
Would they replace a broken saw? Probably, they don't have knowledgeable people running the call centers. Its probably the one time you could straight gas a saw and get it replaced!
Anymore I theorize that about 80% of people's crazy conspiracies are probably correct anymore, huge evil corporations running the world??? CHECK.