There is no such thing as free Sky, well there is freesat but it's not showing Saturday games.
What in fact they are probably selling is information about where to buy equipment to receive signals from different satellites, i.e. not the ones your average Sky dish usually points at. In fact you may need a bigger dish anyway...
You can probably find this information on the net quite easily and free (
www.digitalspy.co.uk forums for e.g.).
That Saturday games - not sure on the legality of it. It will be against UK copywright probably since Sky owns the prem. rights for this teritory. I could be wrong though....