Edit2: OH a big bug I forgot about: As the host, I could buy the "protoss" and "zerg" upgrades after mission-end when the others left, regardless of how many minerals and gas I had. I.e. I had 4 minerals and the upgrades cost 5. I couldn't buy them, but once one of the other players left I could buy as many "protoss" upgrades as I wanted (seemingly). When I clicked it, it deducted the 4 minerals and gave me the upgrade and the mineral cost wasn't red for the next level, so it looks like I could upgrade more. I didn't try it though. I also forgot to ask the others if it worked for them as well. Sorry :/

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