Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dynamically managing the distribution of prizes in a gaming system. In one aspect, a method includes initializing a digital interactive sweepstakes game, receiving player identification data, receiving player activity data, determining a player activity forecast based on the player activity data, updating a prizing algorithm based on the player activity forecast, applying the prizing algorithm to player activity data to identify a particular player, and distributing a prize to an account associated with the particular player.