This is gathered during two multi games. First was 2 people vs 2 Hard AI (1 Star map). Second was 4 people vs 4 Hard AI (3 stars).
-Starbases are not upgradeable. You can buy the upgrades, but they never build.
-Apparently, after buying these upgrades, and then selling them back, the game’s money system bugs. You can buy almost anything and run extreme negative numbers in credits or resources. You cannot purchase planet upgrades or research unless you have the money. So you can buy things (ships, etc), but not upgrade/research if you have insufficient funds.
-You can buy anything once this starts and it could potentially charge you 2-4x as much (sometimes all resources, sometimes it picks one to screw with). You can then refund these purchases and receive extra income over what you spent. We were doing (buy/sell) really fast and we turned a profit most of the time.
-Again, once this all starts, you can transfer credits to another person and in-turn receive even more credits. This does not work for resources.
Both games hosted on my computer.
q6600, 8GB DDR2, 8800 GTS 512, 16MB/s Cable, Vista x64