The Voidsky Skirmish could indeed allow disciples to become members of the Sky Palace. However, before the age of a hundred, new members were only allowed periodic intervals of short-term cultivation in the Sky Palace. After that, they could enter the palace for long-term cultivation, but they could also stay in their original sect to serve and repay them. Only after reaching five hundred years old would they completely belong to the Sky Palace. That was very important, because their identities were completely different from then on. If the Sky Palace had members attack their original sect, the orders must be executed. 

Since the Sky Palace absorbed talents from the Myriad Solar Sects, these sects wouldn’t give up their disciples in vain. That was the reason behind the five-hundred-year...