We'll call the name of this strategy Spread the Risk.
Many players like to bet on single numbers.
However, scattering your bets greatly increases you chances that you're going to win something more often. For example, if you have a few favorite numbers bet the corners and the splits. Let's look at an easy example. Now, instead of hoping for a number that only comes up every 38 rolls or so, your odds of making profitable wager are considerably increased on every roll. Based on these streaks, a profitable strategy is to use the scorecard to keep track of which hand won the last hand.