I don't think the fiver needs spending to realise this is not all square. It would be posted under 'special offers' with a string of endorsements if it was. It's either a con, something illegal, or as suggested by dereks not what it purports.
Oh Knyght Bytes, they are a poor idea that without draconian legislation achieve nothing but a waste of your tax pounds. With such legislation, would infringe on your, and my liberties. - The former worries me less than the latter, so perhaps you should get one, but this would encourage them to pursue this, so maybe not.