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Mich St is currently -3500 v Purdue at Pinny
Pinny offers an initial deposit bonus of 10% upto $500. You have to stake 3 times of your initial deposit and let the deposit and bonus sit in the account for at least 30 days before withdrawal.
Those type of extra incentives could make a game like Mich St -3500 v Purdue very, very attractive.

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Don't know for sure about Pinny, but most sportsbooks calculate your amount wagered towards a bonus requirement as the smaller of the amount risked or amount won (in the case of a loss, always the amount lost). Meaning a win here would get you almost nowhere towards clearing your bonus.