I do not know if the structure is beatable. I prefer MTT's aleast you are guaranteed a shot. Though the Spin-N-Go's shorten the time that is all. Look for good value MTT's $0.22 - $0.50 per $1,000 guaranteed if you have the time. If not then the Spin-N-Go's are better than typical Sit-N-Go's but not better than guaranteed 45 man 90 man or 180 man sit-N-Go.
Also everyone I know who plays Jackpot Poker is broke. Take that into consideration.