Amazon's Glacier secret: BDXL

I always wondered how Amazon got Glacier that cheap. Anyone here use it?

No, but mean meaning to give it a good try.

I've tinkered with Glacier, but really not much.   I was thinking of using it as a back up for other cloud services (dropbox or g.drive).  I'd definitely do that if someone else dealt with the painful bits.  I lost interest to be honest.