I know it is hard to comprehend. Let me go step by step:
1. Sheepy opened a contest for a currency to be added to the game. See title: "Which P&W themed currency should be added to the game?"
2. People proposed some currencies.
3. One of these currencies is the Orbis Dollar, which indeed carries the image of God Emperor Dio Brando, associated with the alliance Mensa HQ.
4. At the end of this contest, the currency that gets the most votes will be added to the game.
Now comes the critical part, pay attention:
5. You will be free to choose any currency for your nation among the following set: The currencies that are already in the game PLUS the currency that gets the most votes.
What was your claim?
"Probably because we don't want your alliance themed currency representing the whole of Orbis. It's pretty simple. You actually are pissing in everyone's Cheerios by trying to immortalize your alliance as representing the game itself."
The winning currency DOES NOT represent the whole of Orbis. It will be the winner currency and added to the game. It does not represent Orbis any more than Bitcoins or Pakistani Rupee. You are, indeed, free to choose any currency you like for your nation.
Again, let me know if you suffer from comprehension difficulties. I can only guess how hard your life must be.