However, it’s worth pointing out that the test above is valid more for the Usability Hypothesis (Can users use it?) vs. the Value Hypothesis (Will they buy it?). Wizard of Oz is useful vehicle for testing your Value Hypothesis, but only when it’s paired with a Sales MVP to test for willingness to buy. For example, Dropbox famously created a WoO demo they put online, but their paired it with a call to sign up for updates, which I would call a Sales MVP. Even though they’re not asking for money, there’s an exchange of value (the visitor is giving up their privacy/paying you with some of their attention).
In addition, the United States Government has recently begun to employ lean startup ideas. The Federal Chief Information Officer of the United States , Steven VanRoekel noted that he is taking a "lean-startup approach to government."  Ries has also worked with the former and current Chief Technology Officers of the United States — Aneesh Chopra and Todd Park respectively—to implement aspects of the lean startup model into the United States Government .   In particular, Park noted that in order to understand customer demand, the Department of Health and Human Services , recognized "the need to rapidly prototype solutions, engage customers in those solutions as soon as possible, and then quickly and repeatedly iterate those solutions based on working with customers."   In May 2012, Ries and The White House announced the Presidential Innovation Fellows program, which brings together top citizen innovators and government officials to work on high-level projects and deliver measurable results in six months. 
Valuation of snowflakes: Intricate, unique, symmetrical, beautiful snowflakes will be bought for $1-$5. In the first round, I never see anything worth more than $1. I rarely pay as much as $3. Encourage innovation by telling people “this is the first time I’ve seen a signed snowflake! $2!” or some such comment. Encourage intricacy–”wow–lots of space cut out, I like that”. Size matters–small snowflakes often can be purchased only two for a dollar unless they’re particularly ornate. As you buy snowflakes, either attach them to the wall or arrange them on the table in order of low value to high value. We’re not stating it in an obvious way, but hint at the valuation scheme every once in a while by hovering a new snowflake over the spectrum and say that this one “fits right about here, ok, $2″.