Cool setup. I'm not a Backblaze customer, so I'm curious. How is your setup better than using their client for personal backup? The webpage mentions threading and encryption.
Backblaze's object storage product, B2, is priced per GB-month, so you pay for what you use. Fair enough. Because it is charged this way, it is open for whatever creative use developers can come up with.
I use B2 because I'm locked out of using Backblaze Online Backup - and that's fine with me, because it's the right product for the job.