Sensei's at least counting the American political and economic favoring of the US enough to grant an expense credit, although I'd argue that the long-term consequences of the alliance are a hell of a lot more important than exactly which brand of bonus we get on one turn.
We do not know how the war will go. Basing it off of the historical outcome is dubious due to the weird(and impossible) technologies we are flinging about. The outcome of the war could be odd, it is not impossible to just be ignored as never having been a proper member of the axis, just someone who failed to embargo them and continued to trade technologies, that sounds pretty bad in its own way, but there are ways and means of getting away with it. And, pwersonally, if I were running this game, I would be royally irritated at people metagaming who will win the war, when at this point in time it looks as though the germans are doing pretty well. Maybe a bit overabitious, but who knows. And once blitzkrieg happens we will know that we are on the winning side!
Really, there is no "join the winning side" advantage here. The real question is: Do we wand Axis innovation or Allied consistency? The allies will never make suicide bombers or jet fighter or international rockets or 1000 tonne tanks. The allies ARE going to make lots of very boring things. Like endless oceans of heavy bombers, or massive computational machines to just grind through endless numbers while a very bored nerd glares at it, or a whole load of big dull carriers, or dozens of different planes that all use the same boring old 50cal...
If we want to cover the basics, we go allies, if we want help with our insanity, we go axis. And remember, we may not get our first choice...
h, and whoever fixed the vote box failed, the votes for what to send are dependant upon who is being sent to...