Point 1: Merchants are still pretty much useless. You can get tons of money buy selling another resource, and completing the caravan game doesn't earn you that much gold. Don't know if having merchants even affects that in any way.
In my recent game (#131), you could sell any Great Person for over 1 M gold. There were dozens of millionaire players in the game, and many more that had Great People so they were potentially millionaires. All the resources cost thousands of gold, even more than 10 k gold per 100 units. DerekB even overflowed his gold surplus at 2^28 = 268 M gold. Absolutely no point in having merchants.. and absolutely no point in building wonders only to lose them to someone else.. well it was just silly. DerekB had 1 M production too after winning the Sphinx auction w/ 5 M gold in his pocket, and he was unable to join any civ due to some bug. Anyway he was able to supply insane armies to the battlefield anytime there was a battle (2500 Cruisers in one slot, for example). Kind of got bored with this game after all this happened..
