When a Big TV channel is selected, it show as a fta channel on MPEG 2 boxes (DM500S, DM600 ...). Although other package channel show the encrypted letter (I, S, CO, V, .....) in red or green, Big TV channels show as FTA.

Even satcodx show most of BIG TV channels as Data & not as TV. pls refer http://www.satcodx3.com/0917/eng/

Why is this? Is there any reason for this?