You will be given $100 for every day you can abstain from orgasming. Every day when you wake up you’ll be given the option to remain in the contest or not. If you choose to opt out of the contest you keep your winnings. If you opt in and fail that day, you must repay all your winnings plus a penalty of $10 per day for every day you’ve been in the contest. So if you opt in and fail on day 300 you’ll have to return the $30,000 you’ve earned plus pay a $3,000 penalty.
You may play with yourself and/or a partner/partners as much as you wish so long as you do not go over the edge. Nocturnal emissions do not disqualify you as long as you were truly sleeping if/when they happen.