The Curve. A recommended read.
“…try to find the 10 per cent or so of your audience who are prepared not only to pay, but to pay handsomely. Don’t limit how much they can spend, but allow them to spend ten, fifty or a hundred times the previous fixed price. That way you are not only widening your audience reach at the lower price points but replacing much of the lost revenue by nothing more complex than enabling those who love what you do to pay more for things that are valuable to them.” – Nicholas Lovell