Is the postage really prepaid? I thought it was added to the bill?
No additional cost. At least they didn't charge me extra on my last one.
I'm not sure if "free" postage is worth it though. Since it was in their packaging and had their name on it, I had to take the extra rubbish from the idiots at the Post Office when I took it in. They're always convinced that it is going to leak and make someone really sick. I told them that it's Blackstone's packaging, and I assume some packaging expert with the Postal Service signed off on it.
When I put it in a small box, and address it to "Blackstone Enterprises"... it makes that visit to the Post Office much more pleasant. They have no idea what it is, and even though it doesn't matter anyway, it makes life much easier.