Counterpoint: Eve Online has both a massive in-game economy and a player base doing a ton of things on the side, including things like giving out loans and the like.

I mean the legitimate loans are outweighed by the scams so people are hesitant to actually set up these things, but still.

Renting is another one, you and your friends can rent a system from one of the larger alliances and get some protection while doing money making activities.