I just can't see how to implement a micro transaction system that would work for AH. I agree that we need to try more to get new players flying, but I don't think that is the way to do it.
Neither can I. Micro-transactions could turn this game into a nightmare.
I still think a half dozen free planes in the MA would help boast the numbers. That would bring in the "Steam" players looking for the "free" games. More players only will help bring in more players. Someone checking out the game see's 300 players on a weekday after school why wouldn't they give it a try. They fly the free planes for a few months , and are now hooked, and buy the subscription to check out all the other planes.
If HTC want to get a bit more into it maybe ....
Level 1
1 vehicle, 1 buff, and 4 fighters all early war for free
Level 2
2 vehicles, 2 buffs, and 8 fighters 3/4 early war, 1/4 mid war, for $5 a month
Level 3
4 vehicles, 4 buffs, and 12 fighters split 50-50 early mid war, for $10 a month
Level 4
All equipment for $15 month
Pay for what you want with out "paying to win"
HTC already has the infrastructure as servers can handle up to 1000 players at once so no need to spend money to accommodate more players even if they aren't adding money to HTC's coffers. It wont "hurt" the game, wont cost anything other than the time to write the coad for it, and could in the long run help the game.