It seems there is a bit miscommunication here, I believe he answered my question about the free/bonus spins as the reward for the review contest and what you quoted above is the rules for the multiplier madness.
Thank you for pointing this out. I thought that OP's reply was related to all the rewards and prizes of their promotions. Anyway, I can see that only two users tried to participate in their review campaign. The deadline for the campaign has ended. Their rewarding system has failed to attract forum members to take part in the review campaign.