Linda Evangelista is a bad example. She -had- to get out of bed to make money. If she was sick, out of town or otherwise engaged, she couldn't generate revenue. Everything was dependent upon her physically showing up somewhere to do something. Smart people figure out a way to stay in bed and still make the $10k.
Many SaaS/e-Book/App-People think, the money comes in even when they're sick. This might be true for a short period of time but as time changes the value of your work decreases. Let's say you stop working for 6month on your project — usually your sales will collapse.
People bashing freelancers/contractors usually ignore this fact. I for one prefer to get e.g. 10k$/month freelancing instead of 30k$ for an e-book that requires 6month work to write + promote.
