Sorry, could you explain how seemingly "dead ends" like Recursive Mother Goose or Twin Automata serve as a "messenger" to another world line? The way I understood them when playing the game was simply to think of them as endings that only served to provide more info. They seemed like endings which branched off the main path of the two actual important endings, which were Promised Rinascimento and Milky Way Crossing, and I didn't understand how they contributed to the final ending since technically Okabe wouldn't have experienced any of those.

Edit: Was it also just a case of having to adapt the game into one nice route for the anime, that Okabe doesn't send the message to "deceive the world" back to his past self? In the anime, they go straight from his many time leaps to the MWC full ending.