The general consensus is that customers cost money -- not just in terms of infrastructure, but also support. Customers who do not want to pay, will never pay,

The general consensus is that customers cost money -- not just in terms of infrastructure, but also support. Customers who do not want to pay, will never pay, but will still cost you money. It's better to aim your product at people who want to pay. Customers who want to pay will not baulk at paying (by definition). Freemium is a loss-leader marketing scheme. There may be other effective marketing schemes that don't continuously cost you money.