Well actually, youd have to lose 8 in a row-5,5,10,20,40,80,160,320...So redo the math and figure that. Or just assume that with 7 it would look like this-10,10,20,40,80,160,320....90 hands time $10 =$900-$635=$265 profit.
edit: add on the fact that when you win a dd bj or a split, you get...