Hi, You are not being ripped off. The cheaper box with the top up TV CAM built in is not AD enabled, although this could change with a software update - as far as I know anyway. Considder this: Top UP TV go out of business. All those who purchased boxes with integrated top up TV card slots would be in a mess if the next card came out and used a different encryption scheme (although this isn't that likely), whereas users who have the CAM PCMCIA like device would just get a new CAM. I know which one I would rather have. Thanks. Andrew.