Also, heres another thought. What about straight donation raffles? You donate to enter a raffle, say the donation is set to a low 20-15. And the prize you can win would go up by 1/2 of what you would normally get with the joining of more people in the raffle? The prize would be credits. And if no-one joins into the raffle, the person who donated would just get normal of what they payed for.