Board Thread:Theories and Speculation/@comment-34656247-20180531072459/@comment-6769189-20180617100943

And where/when was it stated that Curse Mark replaces the users chakra?

Is there any reason to believe that Curse Mark would help a non-Uchiha/Sasuke?

Itachi didnt program Tsukuyomi because it would probably require the user to maintain the genjutsu, where as Amaterasu just needs to be executed and it maintains itself and even spreads.