What motivates players to cooperate?

[Superlagg]

I cooperate partly because its just how I like to do things, but also because I have an idea how it feels to be on the receiving end of not being cooperated with.

I usually don't factor personal gain that heavily into my decisions, since there isn't really /that much/ to be gained, and whatever /is/ gained lasts about an hour at most, when the shift ends and all material wealth returns to the aether from which it came.

Thus in a way, the only meaningful gain to be obtained from any interaction in this game would be memories of that which we have done. Times, both good and bad, last until they are forgotten, and more times typically happen through cooperation.

Not sure where Im going with this, but I like cooperating for the sake of cooperation.