This has probably been asked many times. And I know I'm gonna get a lot of bad responses, but $15 bucks a month for just one game? It's a little extreme. $10 would be much more, you know, smart. $15 a month is more money than web hosting. And besides, it would probably get HiTech more customers. And don't whine that it would attract n00bs. Don't you remember when you were a n00b and couldn't even takeoff/roll correctly? And look at yourself now, you're level bombing bases in that Ar234 of yours by the minute. Just saying, $180 a year is a lot for a game. But, maybe, I might pay 15 bucks a month if you allowed Paypal and by the month payment (no auto renew). The sale depends on user preference. Just getting my idea out there.
~Guymed-
And no, I'm not a n00b anymore. I can level bomb, dogfight, dive bomb, fight in tanks and kill ships fine.