thanks, glad you like it. I agree with the article that the difficulty has been rising making genesis mining not as profitable as you calculate when you assume price and difficulty remain constant. So this post try to predict the difficulty in the future while keeping the price constant. Ofcourse, if the price go up 3 or 4 fold in the future, you will make a lot more. But I do not have a magic ball so I could only make an educated guess on the difficulty. So far, the actual difficult is rising a higher level then the predicted. So the final profitability might be even less than 7% (assuming the price remains unchanged).