Think of it like this, ok.
A kid goes up and puts in $0.25
The kid is there, timer runs out, player automatically selected, he sits there and the player dies from being beat by COMP
If the kid gets up, another person proceeds and puts in $0.25
Second is repeated.
That leads to $0.50
A kid inserts $0.25
He sits there, doesn't choose a player, and it just sits
Someone comes up, and waits for them.
The person gets mad and tells them to hurry up.
The kids does so and plays the game, he is done.
The someone puts in $0.25 and plays
That leads $0.50
Also
Someone could sit their idle without playing, someone comes up who wants to play makes them get up.