How do you make money with communities?

I get asked this question a lot.

For some reason we think community is different when it comes to money. It is, but it isn't.

It's one that really has a simple answer.

Communities make money just like any other business makes money.

There are finite ways of making money in the world, the same comes to community. When you think about making money through community, there are really only a few options you can choose from.