Old teaser, we are still running .78
EDIT: Adding a new section to the OP: How money works. I'm gonna add it here as well.
Money
Money can be acquired one of 2 ways. The first way, is trading. You buy goods at one island and sell them at another island. If you bought 8 sets of goods at $4 each, and sell them for $15 each, you make $88. Awesome right? There's more though. Have you noticed how goods seem to disappear from an island? This is because the island sells the goods! When an island sells goods, it goes into a sort of money "stockpile" for your team. Every 2 seconds you receive a sort of paycheck from this stockpile. Those 8 sets of goods you sold to the island are converted into an additional $120 that is dispersed through your team, so you didn't just make $88, you made more for yourself and are helping your team out! This also means that when you aren't trading at all, and nobody is trading, goods are being sold from each island you control for $4 each. If you control 1 island, $4 goes into the stockpile, 2 islands $8, 3 islands $12, 4 islands $16. The more islands you control, the more money you make for your team. The more you trade, the more money you make for yourself AND for your team. You can also cut off your enemies money supply and make it almost impossible for them to continue. If you kill all cargo planes/boats and kill their factories, they can't trade goods to make money, and they cant make goods to trade for money or for their islands to sell to make money.
TL:DR Islands make your team money by selling goods. Trading doesn't just help yourself, but it helps your team as well. Take out all factories and cargo planes/boats and you cut off the other teams money supply.