I would say the measured impact of something like an xPrize is not expressly in how much money is awarded even though it does directly fuel further R&D and othe

I would say the measured impact of something like an xPrize is not expressly in how much money is awarded even though it does directly fuel further R&D and other expenses of the leading teams. I think it is rather the time and effort that is directed toward achieving the goal and the public discourse that is generated from the process. It is also the fact that a portion of up-and-coming engineers and scientists still in their studies will see it as inspiration to dedicate themselves toward the relevant field(s).