If you are ten times faster than other developers, fixed price per milestone lets you charge ten times as much. If I'm writing a custom map screen for the first

If you are ten times faster than other developers, fixed price per milestone lets you charge ten times as much. If I'm writing a custom map screen for the first time it is going to take me all day. If I'm writing it the 12th time it is more like an hour. I can charge a lot more for a custom map screen than an hour, however, even an hour at the highest hourly rate the market would bear.