The seventh season of Bankrupt Sisters was cancelled because the ratings of previous seasons have been declining. The ratings had been above 7.0 before, and fell to 1.9 before the seventh season was broadcast. The official didn't want to pay a high renewal fee, so the seventh season was cancelled.
TV channels with high ratings set higher prices for broadcasting advertisements, which makes the channel gain more profits in the advertising market, and also plays an important role in adjusting the ratings survey.