The Guardian published this in 2006.. maybe they have more info?

The Advertising Standards Authority upheld complaints this week against The Winners Club.

It concluded the presentation of a prize award was “misleading”, with many people receiving awards that were “not significantly greater in value that the premium rate phone call”.

Capital Letters criticised a “prize offering” from The Loyalty Awards Club on July 8. Both TLAC and Winners are creations of stock market listed Invox.

¬? We welcome letters but cannot answer individually. Write to: Capital Letters, Money, The Guardian, 119 Farringdon Road, London EC1R 3ER or email capital.letters@guardian.co.uk Do not send original documents but do enclose a daytime phone number. Information is general and offered without any legal responsibility. Always take professional advice if in doubt.

Guardian Unlimited © Guardian Newspapers Limited 2006