Page 1 of Extra set top box for Telewest Active Digital?

Telewest charge £15 a month extra to add another box , and you don`t get to own the box. You can`t buy a box from Telewest, but there are 3 for sale on Ebay (at time of writing) that look exactly like mine. One comes with the card but no remote and the other with the remote without the card, but there are remotes on there as well.

I assume they are selling them because Telewest never picked them up, but if I was to buy one of these boxes with a card and remote, what use would it be? Would I still have to get Telewest to set it up and pay the £15 a month anyway?