Prizes in Rigid Jam are, and always will be, optional. But how do they work?
To enter for prizes, simply pay $5 to the paypal listed on the jam page. If you enter a different amount, it is considered a donation, and is completely refundable. Every entry is equivelant to $4 for prizing.
If you submit a chargeback, you will be removed from the prize pool.
When the jam ends, the top 1-10 people who entered for prizing (depending on the number of entries) will receive prizes. If only one people did, they will simply receive their money back.
For example, if four people entered for prizes, the following is what the payout may look like: First place $8, second $4, third: $3.
Also if you decide to enter for prizes, make sure you provide proof of the development time (stream, timelapse, etc.)
And yes, the overall winner is still what is recorded on the leaderboard.
If you have any questions, ask in this topic.