Good question, that's why we put it at the top. Yes, the PostBooks Edition of xTuple ERP is free software – and many of our partners make a good living doing nothing but professional services and support for PostBooks. But there are two commercially-licensed Editions of xTuple ERP as well, and partners earn generous commissions on sales of those products. And other xTuple products and services – such as training classes, network services, even hardware appliances – are commissionable as well. Some of those things you might prefer to offer yourself; that's fine with us, and we don't get in your way.   With this range of offerings, xTuple partners have a solution for a variety of business needs and budgets. As one of our partners once told us, they have the best of both worlds!