Hi,
Re - Be aware that may have local laws regarding paying for the tickets unless you are registered as a non-profit organization, or have special authorization to do so. Some sites like Paypal usually shut accounts down or even can take actions against the accounts of people using their site in that manner.
We are thinking of using this to increase registrations so to avoid the above, can members get a ticket for free and can we restrict it to one raffle ticket per member?