"Nestle Rowntree is launching a £20m consumer push on Kitkat with the introduction of an on-pack promotion called Kitkash.Consumers can earn Kitkash – a unique currency – which can be used to bid for a variety of rewards ranging from ‘2 for 1 Eurostar tickets’, or £500 off a holiday with Kitkash breaks on December 13 and runs for 12 weeks "
http://www.irn-talkingshop.co.uk/news/article.asp?news=Produ ct&articleid=2628
Stopped the new varieties then?