Same here. I noticed that to the minute when they don't allow non-verified account access to purchase from them and now you need to be in order to purchase from their site.
I would assume it is because of the bitcoin price falling so much and do not want anybody to get their bitcoin at these "whole sale" prices for a little while.
They might lift it when the price goes up 0.5x again so they are making more than would selling them now.
I had $100 available for the past two weeks but then get this all the sudden at 2pm est yesterday afternoon show up on my screen: