I bought a few of these when they first came out.  Played with them briefly then sold them.  This goes back to when there was not an altcoin trading for more than $3 (except Litecoin).
Tried to order a quad.  
They said sorry, they out of quads.  "Is there anything else you would like?"  
I asked when they would get them in.  
They said they had no idea and could not even estimate.  
I said, "OK, well give me 4 singles."  
"Sorry sir we are out of those too?"
What the ETA on those?
"We don't know and can not estimate?"
I asked, "What else do you sell?
"nothing sir"
So I assume we are only speaking with the hired help.  Someone else is pulling the strings.
My guess is either legal trouble or they are actually selling everything they get to big customers.
EDIT - of course what do I know.