We understand the difference between selling physical goods and digital goods. The old-fashioned systems currently out there were designed so that people could sell physical goods from their brick-and-mortar stores over the internet. Digital goods are fundamentally different, which is something the big guys just don't get.
Want to make payment voluntary? Want to allow access for a limited time period and give people some time to pay? Want to make payment mandatory and immediate? Whatever floats your boat. We are flexible, so you can maximize your profits.