[Neil Jones]

Anneka Rice mentioned that Challenge Anneka was on a floating schedule so it seems that talent and indies are aware that a show might get pulled if it doesn't perform.

Aren't pretty much all programmes on "floating schedules" to an extent?
If they don't get enough bums on seats they'll get replaced with something that does gets bums on seats in that slot, and the original non-bummer will get put somewhere else in the schedule - until probably about the third or fourth failure of attracting bums and then it'll get burnt off at some ungodly hour of the night where bums are less important to a degree and the show is never seen or mentioned again...