1. We are still trying to work on a solution for Mineority, they might be able to install Dynavolt devices, too early to tell.
2. The advertised hash rates of 14-22KH/s for CN7 do not include over-clocking by increasing voltage to 0.95V.  The theoretical hash rates for over-clocked cards with elevated core voltage are significantly higher than the advertised values.
3. There is a great convenience to having someone host your cards, *but*, given the amount of tweaking needed, and the fact that different developers are using different OS and different interface (PCIe, USB), my personal opinion is that you would have more flexibility with the card in your hands, assuming you have somewhere to put the cards that won't drive you crazy in terms of noise, but that is my opinion.  If you only had space in your bedroom, you would be way better off hosting the card somewhere else....