A domainer is a person who registers domain names as an investment. How many domainers do you think there are on our lonely planet? What data backs up your estimate? I think the number is up to one million because most domainers are probably Namepros members and there are over one million members but not all members are active. So up to one million domainers seems like a good estimate. Then again, not all domainers speak English so maybe it's more like two million?