If Iunderstand their offering correctly, they are expecting shareholders to commit themselves to buying shares at an unknown price. You can't change your mind after Cornerstone receives your agreement to this offering. I think I'll pass on this and gamble on buying shares when they drop in price as they normally do.
I think that I will wait until about Dec. 6 or 7 and see what the price looks then. I believe Dec. 8th is the last day that you can actually buy the stock at 90% of the closing price on Dec. 10. Should be able to get a pretty good handle on the price direction of the stock by then.