I doubt it has anything to do with morals, legality or respect for toei/shueisha.
The dude has been leaking stuff for over a decade and probably knows what goes on behind the scene, and leaking stuff too early like this seems like a surefire way to draw too much attention torwards leakers, where Toei might double down their security or start getting trigger happy with copyright claims and such.
It doesn't mean it would legally affect this site or any other forum, but simply that there's probably a reason why Redon and other leakers don't just throw a full summary and scan the whole magazine on sunday even though they probably could, since doing so might compromise the entire leaking operation.