Different rummy variations can have quite different scoring schemes, but generally speaking, points are given according to how many cards are still in opponents' handsplaying slots after one player leaves. Because players must strike a balance between the need to minimize the number of points left in their possession & the desire to meld quickly, this scoring element adds another layer of strategy. There are numerous variations of rummy to suit varying tastes and skill levels, so it's not a single activity.
