Of course, the Divine Sect has both gains to eat and earn; if the plan succeeds, they'll have an additional Supreme out of nowhere. If it fails, they can also watch the Demon Palace's infighting until bloodshed spreads across the ground, which is naturally within their interests. That's why they only provided a bit of tiny help.
In other words, in this battle of Suiyang, the people of the Divine Sect clearly set up arrays and slaughtered people, but in fact, from the beginning, they all held themselves back. They could come and go as they pleased. If they won, the banker devoured all; if they lost, they'd simply perform Golden Cicada Sheds Its Shell, not losing a bit.
