Just think: if KnC sells 1,500 Jupiters and delivers them quickly, when added to the rest of the network each one will probably produce aprox. 1BTC or less per day, and ROI will be unlikely. If they sell +3,000 Jupiters (which seems likely they will do), when they arrive each Jupiter will produce 0,5BTC per day or less, and ROI won't never happen.
1/2 a BTC per day?! That's what worries me, especially for those of us mining without Jupiters and Saturns.