Fy17 npat forecasts?, page-59

Yowie chocolates outsold their biggest competitor, Kinder Surprise, "taking 30 per cent of the $80 million children's confectionery market", Foster Stockbroking's Haris Khaliqi says.

But when Cadbury wanted the rights to sell the chocolates worldwide, it sparked a dispute with creator Courtenay and Pike.

Unable to come to an agreement, Cadbury removed the brand from shelves in the mid 2000s.

http://mobile.abc.net.au/news/2014-08-13/yowie-chocolates-relaunched-for-us-markets/5656016

Cadbury were selling over 1 million Yowies a week or 3.5 per person a year. So no it didn't stop selling because it was a fad big Leon.

If you extrapolate those numbers to an American scale than we are talking huge numbers, as Neilson data suggests it is becoming very popular very quickly, all without a major advertising campaign.