That's how you rate most machines.......full house/flush 10/6 is a little better than 100%
South Point all King Game machines are 9/6 in DDB and the club points are generous so it's not a bad game at the South Point.
What he was playing in actuality was a single line $2 DDB Machine.
DDB is my favorite too but has a very high variance. And in gambling variance is almost everything.