[brudgers]

The donation pay what you want model suggests that the developers think the product might not be worth anything. My advice for a business: figure out how much you need to charge to make enough money to run the business and charge well in excess of that. If people pay it, then there's a business. If they won't then there is not. If the developers are unwilling to charge money then it's not a business...which is ok so long as nobody pretends it is one.