They must be among the top 15 global providers, by Gartner-estimated market share for the evaluated services (public cloud IaaS and standardized private cloud IaaS).
Because grain could be standardized, its values could be abstracted to finance, forming the basis of the futures market which fairly quickly outgrew the value of the physical markets.
In fact, Dr. Jardine created his tape in a standardized, easy to apply format so that it would be adopted by the general consumer market to help with sore and achy muscles.