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 :)
(verberg) Indien u iemand in zijn of haar moedertaal wilt begroeten, kunt u gebruik maken van ons Spelerswoordenboek welke u kunt vinden via de "meer over de talen"-link onder de vlaggen rechtsboven in uw scherm. (pauloaguia) (laat alle tips zien)