Fanduel Round Robins

[HarleyDog]

Someone please explain how I can place a round robin bet for $5 and chose the moneyline on the entire slate of games without having to dump several hundreds into it. If I understand round robins correctly, the more games you win, the more money you win. Well, I don't recall ever being below 50% on picking the winners of a slate, so I figure this might be an easier route to win cash. Am I wrong in my thinking?