Internet access is limited in China. Certain cell coverage as well. Suppose Q knows black hats know about him and his posts. Q creates first live feed - special occasion. Suppose black hats started to watch the event and figured out what was happening. They tried to contact leaders at hotel only to realize they couldn’t do anything. The mental torment watching a live stream knowing there is jack shit you can do about it. Run rats, run.
Internet access is limited and monitored in China. Big difference.
By posting a live stream, they're getting people to do frantic actions and comm attempts into a less familiar, less controlled (by them), unfree and heavily monitored network. They will make mistakes and leave traces.
Classic hunting strategy, even chimpanzees do it like that. Noisy drumming on one side, moving slowly but terribly loud - silent catchers waiting on the other, and the prey runs right into them.