You make a wager of your choosing and you control all criteria of that wager - how much weight you want to lose, how long you want to take to hit your goal, and how much you want to wager each month. If you successfully hit your goal within the time frame that you choose, you'll win your prize. Your prize is the amount you wagered + a profit amount that's anywhere from 11% to a whopping 300+% based on a number of personal factors.
You can read the Rules for our personal HealthyWager challenge here: https://www.healthywage.com/rules/healthywager-challenge-rules/
Please let us know if you have any other questions.