Someone replied to you on the wrong comment I think, here is their answer:
"Pretty sure the bots go look for the next chapter automatically. they will upload i without caring about quality. Probably the first ones they find.
Humans wont be able to upload as fast as bots. If you put a placeholder chapter, the bots would think that chapter s already in mangago so they would look for the one after. Which wouldnt exist for another week. Really only works with series that is up to date with the current releases"
Lol, yeah thanks!
Fir whatever reason the bots would also split a chapter up into like many parts… just look what happened to the latest S Class that I raised…
thank you guys!
so how does this placeholder stop bots from automatically update a chapter?