Given that: it takes no less than 1 second to type a random number and post the comment; the probability to guess is 1 over 1 million; even a builder can make more than 3.6k/hour; given all this, the payout should be greater than at least 10 times as much (i.e: 1M) to make it worth the time (and it was a very conservative best-case-scenario estimate). Here's a nice post somehow related to this (I'm not the author of that, unfortunately): https://what-if.xkcd.com/22/ Unless the number you are thinking of is not random, but has a particular meaning to you, and you're looking for anyone that knows you well enough.
