Ah it feels so good to be in power again!
550 AD (0) Upon taking control of Carthage Inc. I begin to undo some rather questionable micromanagement choices made by my predecessor. It is so inefficient to produce so much all this extra food that is just being thrown away! My predecessor has thankfully actually left movement on multiple workers, which are put to work immediately.
I also swap around a whole bunch of build orders, mostly from cavalry to something else.

I do however keep most of our core cities on cavalry.
560 AD (1) Oea barracks -> bank. Swap Utica to settler, rush for 60g, swap back to barracks. I spend money in Cirta on a top-secret military project.
570 AD (2) Utica barracks -> cavalry. Tenochtitlan completes JS Bach's Cathedral. Seoul completes Copernicus's Observatory. I upgrade our lone knight to a cavalry for 20g. Money mysteriously gets spent in Carthage, Hippo, and Leptis Magna.
580 AD (3) Carthage cavalry -> cavalry. Theveste barracks -> cavalry. Cirta cavalry -> bank. A mysterious project receives funding in Utica. Oh, and also in Rusicade. Some of our mercenaries also get equipped with these things called "muskets".
590 AD (4) Leptis Magna cavalry -> cavalry. Hippo cavalry -> cavalry. Secret spending in Carthage and Theveste. A different approach to secret spending -- some would say "non-militaristic" -- breaks ground in Cirta.
600 AD (5) Carthage/Utica/Rusicade cavalry -> cavalry. Sulcis barracks -> marketplace. Tula Numidian -> walls. Some more muskets are seen prancing around Carthage, Inc. Also, one of my underlings has filed paperwork to declare war against America. I don't know how this happened; the underling is summarily fired, so I'll have to deal with it. Spices get sold to Egypt for WM + 18 + 1 worker. Mysterious spending this turn in Hippo, and the same non-militaristic spending takes place in Cirta.
610 AD (6) Theveste cavalry -> cavalry. I pay 12gpt to the Koreans for an alliance against the Americans, and 25gpt to the Egyptians for a similar deal. Some more "muskets" are made, and more money is spent on our secret project, in Leptis Magna. Some underling reveals some of our IP files on our formerly secret project to Greece for only 26g! This underling is fired, although 26g was in fact all that Greece could pay.
620 AD (7) Hippo cavalry -> cannon. It is time for the first test of my secret project. New York is the site of the test; resistance is surprisingly weak as a hostile takeover succeeds without much difficulty. [dance] Philadelphia also provides little resistance to a hostile takeover. More spending on the project takes place in Theveste, Utica, Rusicade, and Carthage. The secrets of Astronomy are sold to the Iroquois for WM + 11g (all they had). I then send Spices and 25gpt to the Aztecs for Furs + 3g
630 AD (8) Carthage cavalry -> cannon. Leptis Magna cavalry -> cannon. Buffalo is the next acquisition of Carthage, Inc. I rush a bank in Sabratha for 372g.
640 AD (9) A deal with the Iroquois for Silks ends. I send the Iroquois Banking and Metallurgy to keep the Silks coming even though Silks are now just out of my grasp; it will be a while before I can keep the silks near New York safe and secure. New York is unhappy with the hostile takeover, and riots. Philadelphia is so unhappy that it revolts back to American control.

Utica/Theveste/Rusicade cavalry -> cannon. Sabratha bank -> barracks. Oea bank -> cannon. I successfully launch a hostile takeover of Miami. I rush a marketplace in Hadrumetum for 116g, and in Sulcis for 288g. I send 69gpt to Egypt for the secrets of Physics plus 1 worker. Physics goes to Greece for Navigation + 12g. I take out small loans from Korea and Egypt. I swap Saldae, Leptis Minor, and Nora to libraries; we could use some culture, after all. I swap Rusaddir to a granary, as that city could use the growth capacity. I sell Navigation to the Iroquois for 8g. I rush a granary in Carthago Novo. Cadiz is vulnerable to attack, so I swap it to walls.
650 AD (10) Carthage cannon -> university (we're not the tech leader, after all). Hippo cannon -> Magellan's Voyage (we don't have a single Wonder yet!) Leptis Minor library -> university. Hadrumetum marketplace -> walls. Cadiz walls -> library. Cirta bank -> cathedral. Nora library -> barracks. Rusaddir/Carthago Novo granary -> aqueduct. Sulcis marketplace -> library. Saldae library -> aqueduct. I manage to re-secure Philadelphia. I merge a worker into Leptis Minor. Two more hostile takeovers ensue, in Washington and Baltimore. I capture some workers near Washington, and move many troops to New York to secure it against rebellion.
I need to make some deals to secure my legacy as an excellent CEO. With this in mind, I perform the following trades:
I buy Gems from Korea for 45gpt. I was hoping to prevent starvation in New York, but it appears I miscalculated -- my bad!
I purchase Democracy from Egypt for 88gpt + 12g (miser).
I purchase Magnetism from Korea for 70gpt + 10g (miser).
I purchase Economics from Egypt for 39gpt + 18g (miser).
No one has Free Artistry, and we could use a wonder tech of our very own, so I start lone scientist research on it.
I sell Democracy to Rome for WM + 10g (all Seizure has). It's not like Democracy is that much better than Republic anyway.
I take out a loan from Egypt, getting Cleo's 30g that I gave her for 2gpt.
I get a similar loan from Korea, getting Wang's 121g for 8gpt.
I sell Democracy to the Aztecs for WM + 3gpt + 18g.
I ally with the Iroquois vs. America for 11gpt (lowest gpt they would do it for).
I ally with the Aztecs vs. America for 17gpt (ditto).
I ally with the Greeks vs. America for 11gpt (ditto).
I ally with the Romans vs. America for 20gpt (ditto). This full-scale dogpile will ensure the complete takeover of America as rapidly as possible, lessening the danger of revolt.
The Greeks now have some money, so I sell them Democracy for WM + 13gpt + 2g.
The Aztecs also have money now; they get Economics for 23gpt.
I rush a temple in Miami for 236g; Miami is menaced by Egyptian culture.
I realize that Hadrumetum is pressured by Aztec culture, so I rush a worker there for 80g, then rush a temple there for 200g.
Leptis Magna can finish its cannon 1 turn faster if I rush a settler there (for 16g) and swap back to cannon. I do so.
I think this is a legacy that will be greatly appreciated by my successor, T-hawk.

I am graciously ceding control of Carthage, Inc. for his successful prediction of imminent hostile takeover action -- such vision should be properly rewarded!
The final tally:
"From Cities" Income: +918
Treasury: 7g
Net Per-Turn Income: +161gpt
Download the save here!