Rude!  That's all I have to say to Bitmain.  Money hungry Pigs!  Great products for the most part but selling PreMined equipment is just uncool!  We're fools if we don't believe they have the tech but choose to upgrade their own farms first, then try and sell them as S7's.  May be wrong but the silence would tell anyone that this is the course. 
Don't ever again advertise a product you don't intend to ship, not just once but twice.