That is just a measure of the confidence the seller has in his product. He's he says that there's a 219:450 chance that his product will go bust before the period is over :)
(hide) In the mood for a quick game that is guaranteed to finish within 2 hours? Create a new game of your preference, select the Time for game and set Time to 0 days / 1 hour, Bonus to 0 days / 0 hours and Limit to 0 days / 1 hours. (TeamBundy) (show all tips)