Normally I would keep out of threads like this, I would simply roll my eyes and go on. However its been a bad day at work, so I'm going in.
If this idea was implemented, I would walk away from the game, tell HT where to put such an idea and find another addiction. I haven't played in a while, but I like the idea that when I do, I can log on and fly a Spit 1, Hurri 1, P51, LA 7, Stuka or Lancaster to my hearts content. Because I haven't played in so long, I know I am cannon fodder. I up, get shot down. Up, get shot down. Up, get a kill/assist, get shot down.
With your proposal, By me doing this, I use up my 'resources'. I would use them up rapidly and so have to log off. I wouldn't be bothered logging back in because that's a new start, I'm not too keen on new starts. If I CTD in any game, I generally go away and do something else.
As I said, I would then think 'Well, whats the point in paying HT £7.00 a month, for a game I rarely fly that's going to limit me to what I can fly and how often. Screw this'.