Conversely, there exist people who will do work for disproportionately poor compensation just because they like feeling useful -- the driving force behind Mechanical Turk.
And I mean opposed as in, gaming is usually done for your own sake and enjoyment (with or without friends), nothing to do with helping someone else, most of the time. I don't mean gamers are unfriendly people (I'm a gamer myself), just that the concept of gaming is more a personal goal than an altruist one.