So basically you are only selling a pre-order concept. Your description means nothing really as none of that has even been proven yet because there is no Alpha-T card or even a prototype.
Also your figures are off.
Could the real reason be cold feet ?
Basically yah, its a pre-order... The numbers are a bit off, but to my detriment... If you wanted 25 mh/s in GPU's you would spend much more then 30K...