@limitlesssigil: You likely didn't understood what I said though, can't blame you for that, I'm talking about the fact he said he name Madara is power itself, Obito didn't gained anything from stealing Madara's name, neither lost anything when they discovered he wasn't Madara. And about your post, this is something that I sadly can't answer due the fact that following feats, Ichimonji decrease the power of those which names are cut, and not increase it, and even if increase, we don't know the limits for it.
If you want to be technical he both gained and lost something in those instances
He gained the fear of the entire world by naming himself Madara Uchiha and led to the beginning of the War
He lost that fear upon his true identity being revealed.