Yeah right, people not being paid cheap in a call center

. You should start and look for a job in this sector and see how much you will get out of it

Even if you take a "decent" salary for someone in a call center is California, try and compare it to the one of a developer in Tokyo...
Also protip: the number you dial means nothing. You can dial whatever area code you want, your call could be redirected anywhere without you knowing about it. You cannot determine where a call center is located. I'm not saying that SE support itself it outsourced (no way to confirm it from where we are), but it's just a common practice in the industry nowadays. All major companies outsource their support. They only keep a handful amount of employee on their company HQ just to supervise the whole thing.
As for the time you can call, seriously in which world are you living? Ever heard the word globalization? I can call my ISP support during daytime while their call center is in India. Are you aware that you have people working 24/7 everywhere around the world for that? Some employees in these call center even receive "culture training" in order to know more about the country they are supporting. They also listen to the news and keep themselves informed about anything such as the weather so the customer feel like he is talking to someone nearby and the agent can hold a conversation about any kind of recent event happening 10,000km from where he is.
DEVs cost can hardly be reduced. If you want a quality game, you need good devs, that cost lot of money. And you cannot easily outsource all your devs. It's just not convenient and you don't save that much either. However for things like CS, you can save money easily, without impacting much customers
Pay by day or even per hour of gameplay is a model that is widely used in Asia (just like for internet back in the day, you can purchase bundle of 20/50/100 hours etc.). For some reason it never made in it the West. At least I'm not aware of MMOs using this system. Closest I know is Dofus that allows 1 week subscription. But that's mainly so young people can pay using their (parents) phone.