Game racks attract an audience of boys. Freudians used to talk about "latency": gender-segregated groups are very common in pre-adolescence. In many places, the game rack is the social territory of a boys group.
The game companies didn't necessarily want this audience. But it's an audience they can reach. (Lots would love to reach the same set of girls, and all would love to reach slightly older kids because they have more money and because Americans are currentl