A Common Pricing Mistake
There is also a danger to trying to extract an amount of money as close as possible to the value from each customer.  The difference between the value the customer receives and the amount they pay usually turns into good will towards the product, and in turn how likely they will be to recommend it.If you're going to have different pricing tiers, the higher tiers need to ostensibly have more work put into them.  You can't just say that if you fit into one bucket of people we know you have more money, so we're going to charge you more (e.g. DVD regions).  You need to give them something more for it, so that your customers don't hate you (e.g. HD movie downloads).Nobody likes to feel like every possible penny is being wrung out of them, or that they're being unfairly targeted to pay more.  Measuring happiness of customers or how likely they will refer others is more difficult than measuring which product each customer bought, but just because it's harder to measure doesn't mean it's less important.