The only reason nexon lost gamers was because it cut off South America. Last I checked they had several million profiles, so they're well in the green when it comes to fresh meat coming into the market.
And you are pretty much wrong when you say games can't be balanced. COD-4 and World at War did a marvelous job at balancing the multiplayer. The only complaint that I commonly hear is Martyrdom, which really is quite avoidable, unlike the M-416CQB.
Bullshit is when you work for six months to get to an item, then have some guy with five dollars walk along and pay for it because he got money from his grandma that weekend. Imagine if EVE allowed a person to donate fifty dollars and you'd get a titan. You remember that ship that takes months upon months to build up, if not years, for the more powerful ones...
What do you think that would do to the veteran community who had been in the game since the beginning?
I wouldn't mind paying five dollars a month to support combat arms in just a normal fee, similar to runescape, but you should still have to work to get an item. otherwise it makes basically the gameplay meaningless and in the end, they'll simply shoot themselves in the foot.
There's no goal to aspire to meet and in a few months, that Private who bought a CQB will get bored after he realizes that they only release one map every two months, give or take.
Perhaps I'm just talking from my own experience.