If 24 dollars is "an arm and a leg" you really can't afford 15 dollars a month for a video game, let alone the electricity and network connection necessary to play.
Once again, people decide what is valuable to them on a case by case value. If it isn't worth it to you, fine. That's your call. But calling others insane or other things because they can skip 3 takeout meals or a couple shots at the bar on the weekend and buy something else is narrow minded. Value is where you find it.