Cold, hard reality check: If you adopt this approach with most big businesses or almost any government department, the people you are dealing with will be required as a matter of corporate policy way over their pay grade and/or law to pay you as close to nothing as the contract permits.
It's a cute gimmick, but as the article suggests, its applicability is basically limited to ongoing relationships with regular customers who already know roughly what you charge. In that case, presumably there is little scope for them to dramatically over- or under-estimate your effort, and all you are doing is adopting the risk that on balance they underestimate instead of charging a fair price for actual hours worked and gaining a fixed return for your effort.
There is a technical term in the business world for someone who adopts risk out of proportion to the expected reward: "fool".
It's a cute gimmick, but as the article suggests, its applicability is basically limited to ongoing relationships with regular customers who already know roughly what you charge. In that case, presumably there is little scope for them to dramatically over- or under-estimate your effort, and all you are doing is adopting the risk that on balance they underestimate instead of charging a fair price for actual hours worked and gaining a fixed return for your effort.
There is a technical term in the business world for someone who adopts risk out of proportion to the expected reward: "fool".