IGT was right when they said you should use the same strategy for Spin Poker as single line video poker. Mathematically speaking the odds are the same. However Spin Poker has greater volatility since 9 different lines share many of the same cards. The same is true of multi-play video poker, the strategy and return is the same for a single line game. I do get into the volatility of multi-play video poker in my video poker appendix 3.