You earn 5 FDP for every $1 you spend to enter a paid contest. And you can use your earned FDP to enter any paid contest on FanDuel. Sometimes we even run special promotions that offer FDP bonuses, or increase the rate you can earn FDP.
However, if you cancel a paid entry or enter a paid contest that is subsequently changed to a free contest as a result of not filling, you will not earn any FDP for that contest.