regarding the collection of skeletons in "Mr. Skelet Revenge".

It's unlikely that the tournament organizers will allow this. In this case, we might not receive saves from many participants at all. Or everyone will send their saves on the very last day.

Why do you think so??? Hmm... the fact that a save is sent earlier or later doesn't change anything...
Let's say a person sees in the table that someone already has a preliminary first place... but they don't know how many skeletons that person has. So, that person (who looked at the preliminary results) sending their save, no matter when (immediately or at the end of the tournament), if they have more skeletons, they will take that first place, and if not, they won't. I don't see any connection between the time of sending the save and