Credit to kimplix for mentioning it in another thread.
ViewersLogic - For your participation, you will get a £5 Amazon.co.uk Gift Card* each month as long as the app is installed on your phone.
In order to be to participate in the panel, you need to have one of the following:
1. A Sky set-top box;
2. A Virgin Tivo set-top box;
3. A Samsung or LG smart TV with embedded FreeView