The channels that appear on any TV platform (apart from the basic PSB channels which are "must provide") are the result of a commercial transaction between the channel owner & the TV platform provider. The more TV platforms a channel joins, the more the costs go up. Its an open market, & the regulator encourages TV platforms to be different, so you will find different offerings on different platforms, even with channels that are "free" to the end user. You will also find channels that are free on one platform, but are subscription on another.
Cable customer since 1993. Services: FH TV, Sky Sports & Movies (2xV+), Talk Unlim Telco, VIVID 100, Virgin PAYG Mobile