[peterbsmith]

Some clients are rich. You could charge by what you feel you're worth, say $50/hr. Or you could charge by what they value the work at - at that might be 4x as much. They might be used to paying $200/hr, and are happy to do it.

That mentality is similar to charge by value.

[CodeWriter23]

Demanding a higher rate allows clients to select for themselves whether they will be on your client list.