It's a great idea and similar website have been available in the US for a little while and there are a number of other UK based sites which let users bookmark products they like, then earn a referral from all that they 'sell' to their friends. Shopping sites and cashback sites have been merging into social cashback shopping and community sites which share the commissions available due to online marketing budgets with everyone who helps to spread help and advice about products they like. It's all about sharing product recommendations with your friends. A genuine referral is always the best form of marketing after all!