In the fight between Void Blade and Quan Zhen Sect, it was inevitable that Sanguine Alliance would be brought up in any discussion about the fight. If Quan Zhen Sect lost, it would seem that Sanguine Alliance was extremely weak. Conversely, if Void Blade lost, it would instead not reflect that badly on Sanguine Alliance.
Sanguine Warflag understood the temperament of the members from Quan Zhen Sect. They were all very pragmatic players and were not too concerned with the issues of integrity. If there was money to be made, these members did not have qualms killing themselves a few times for it.
Void Blade definitely was not short of money while Quan Zhen Sect was absolutely shameless.