And when you carefully target channels you end up with small niche audiences. Those small fragmented audiences aren't very appealing to large budget mass advertising campaigns. So then you have to charge people a fee for the the channel to pay for it. And lo and behold you have just reinvented Pay TV.
FTA survives in the US with 50% of the market, but that is because there are 4 major networks that are networked across a market of 280m people, supported by some small local stations (which are also now moving to networked News and Sport to survive).
Some actual competition between Pay TV channels (and an efficent delivery system e.g. not an analogue based cable system owned by a phone monopoly) would have been the way to go about that.
What Seven wanted to do is run Pay TV sports and movies against Foxtel using terrestrial TV. They were prepared to take that gamble because they aren't making any money. Channel 9 and Channel 10 are hugely profitable so want the keep the status quo.
dewatf.