Thanks for the information, I didn't know those drives were refundable!
I was always turned off by having to download a huge zip file from backblaze when I wanted to restore something, but this actually sounds really nice of you guys for large datasets.
We didn't originally offer refundable hard drives. About six months ago we started this quiet experiment of allowing full refunds. We were worried it suddenly make the USB drives hugely attractive and overwhelm the currently deployed servers and Backblaze employees dedicated to the USB restore tasks. :-) It's been a successful test, and now we'll start promoting it more.