Good for Sam. Now you just need to get your prospective clients to get wind of this, right before you quote them your steal of a $300/hour rate. Level-setting is a powerful thing.
I don't think that is the point at all. His own projects are so important to him that unless someone offers him $1,000 per hour to work for them, it isn't worth his time. He isn't trying to get new business: he's trying to keep business away, unless it's so lucrative ($10,000 for 1 days work) that it's nonsensical not to take it.