Basically, 99 has been set for each user to choose their preferred location. But I will close it after 14 days, whoever wins will win the prize.
Although it will not be complete, the raffle will be drawn among the few users who will be here.
Do you really want people to win the pool prize at all?
What if it falls on a number that no one has chosen since you said that it won't be complete, how will you determine the winner?
As far as I know, the pool prize is very little so not many people will show interest to participate in the raffle draw, it will be better you increase the slot for each participant maybe upto 3 selections just so that all the numbers can be filled in order for a winner to emerge at the end of the raffle draw. Again, you can invite few users from the local board who you know that they've participated in a raffle draw before otherwise you will have few number of people showing interest.