sbiddle:
Just to add to this...
Asking same said friend who I mentioned earlier about the Igloo issue he's not aware of any successful CGA/Disputes Tribunal claims against Sky TV for shutting down Igloo and leaving people with a crippled box despite this being under the ~5 year period accepted as being a reasonable life for a consumer electronics device.
Without more info this doesn't really help in assessing whether Spark would have a case to answer. It may just be that Igloo owners haven't had the numbers, organisation, funds, time or determination to pursue it. If really invested in this then it might be worth reaching out to Slater Gordon in Aus who were behind the class action against ANZ bank for excessive fees. This was ultimately unsuccessful but ANZ agreed to pay the litigants' costs, so if you really want your pound of flesh then even losing can be a win.