Actually it's P2W in a much simpler way. It's simple: if you buy gametime, you get to put in more time = faster progress. If I don't pay, but go free to play, I'm advancing less quickly and thus I will ultimately always get fucked in the ass by a guy that paid more money to advance more.
It ruined the former 'balance' where your status was directly related to the amount of time you put in (or bots, whatever) and directly links it to money you put into the game. This is ultimately a somewhat good bussiness move for Jorbtar. Obviously if I get put behind the people who actually PAY, I'm gonna either walk away from the game or pay. And any payment they get is probably good. That's why they set it up.
But gameplay wise it's shit.