Personalised URL's for referring a friend

I recently opened an email from BrandsExclusive and wanted to share a product that was on sale with a friend. When I did a little search for a ‘share with a friend’ feature I was given the option of a personalised URL i.e. http://www.brandsexclusive.com.au/i/amanda__suefong/. The personalised URL made it easy for me to post on Twitter, Facebook and of course in an email. I really like this option for referring a friend, it’s not unlike a typical affiliate link really, and it makes ‘sharing’ the news completely portable and track-able. Having tried implementing 'refer a friend' programs in the past, this method is far less complicated for the provider as they do not have to keep track of which emails where sent from whom etc.