That's only as the majority people will build a site, start learning the best way to drive visitors to that site, but once they don't see many results within little period of time, they provide up.
In all lotteries, mention is done of the percentages of successfully winning. http://www.stanley-steamer.net/__media__/js/netsoltrademark.php?d=bitmemetalk.net%2Findex.php%3Ftopic%3D1094850.0