Very big NO to this idea also 
Subscription models are out of date unfortunately.
If we had a way of merging the two, Lets say 15$ gets you the planeset as it is minus perk rides.
$10 A month gets you access to all arenas except Late war. Perks can only be used in the arena they were earn't.
Free to play guys get 30+ ENY rides only, in any arena.
Perk point market place, generates extra revenue for HTC to spend on alcohol or updates. If he was playing hard ball I'll go 50/50.
The value of a perk point would be the biggest thing. 1$ a perk is too much, something closer to 10$ for 100??? That would get you a temp or f4u4 even that seems a little steep. So maybe a fixed price for a certain plane would be the best way to restrict them. Also with ENY it would still prevent the horde from flying uber rides.
If anything the hunger to generate perks may drive gameplay into early war birds for the vets and free loaders alike creating vast furballs. People would try and survive more so potentially less HOing. You could argue people would become timid but it will be hard to run in early war planes and being aggressive for more kills / time means running becomes counter productive.
