(2 part post):
The 'satellite' part of the name is misleading. All that the software does is to provide a media player which is configured to take feeds from free internet TV services (which you can get anyway, without paying for Satellite Direct).
Most of what's available over the internet is either incredibly dull and boring or impossible to understand (because it's in a foreign language). For example, the BBC doesn't have international broadcasting rights for most of its output, so most channels aren't streamed live to the internet. (Even the BBC iPlayer isn't available to internet users outside of the UK). So you can't get BBC1, BBC2, CBeebies, etc over the internet. Only BBC News is available (and possibly BBC Parliament - I've not checked on that one). Similar situations apply elsewhere in the world.
You can get an idea of the (very limited) range of channels you can get with Satellite Direct by looking at this screen grab (taken from Satellite Direct's own website):
http://www.satellited.../help/images/main.png
Look at the 'genre' column. There are religious channels, shopping channels, educational channels and minority sports channels (e.g. Archery TV) but no entertainment or film channels. (There might be some further down the list than can be seen in the screenshot, but they'll certainly be in a minority).