Yet. Infrastructure on this scale moves slowly and the transparentness of pricing changes on short time lines in physical stores is hard to track. It exists in emergency economies - we call it price gouging - but that’s usually quite obvious. The idea of dynamic pricing has existed forever - hotels, airline flights, movie tickets, taxi rides, even electric rates. As technology advances it offers the opportunity to use the technology to shorten the time window for pricing changes more and more. An extra two tenths of a percent profit seems like a trivial amount. Amazon and Walmart combined for more than a trillion dollars in sales last year. 0.2% is a very non-trivial $2 Billion. If it becomes available, it will be exploited.