Answer me this question.
Does Path of Exile have a persistent world that is shared by many players at the same time. Where you can meet and team up with other players. If so then it is an MMO. Having a persistent world is what an MMO is all about.
It does NOT. It works very much the same way Diablo 3's online functions.
And who CARES if it's an MMO or not. Valve adds free content to their games and none of them are even CLOSE to being an MMO.
THe point is Blizzard has a constant revenue source called the RMAH (micro transactions in other games). This alone should justify ongoing content development.
Lets also not forget the whole game is designed to push you to spend 1000's of hours on ONE character. Much like an MMO.
The simple fact is, Blizzard has an archaic old fashioned business plan = Boxed copy and DONE.
This is 2013. Things are different in the gaming industry since Diablo 2. People wouldn't be asking for continued content if the game wasn't set up in a way that would easily facilitate it AND have such a lack of content in the base game.
I see then here is what we can do, since they obviously make in the trillions of dollars per hour in the RMAH and only pay about a penny every 10 years for maintenance and PayPay fees. We can camp at their door step until Blizz churns out new content on the rate of once per hour, okay. Back to reality.
I say that the RMAH is not making them a ton of money compared to their MMO subs SC2 and WoW. The amount of profit it generates is no doubt pocket change. There is also the overhead that is involved in maintaining the servers as well. Plus the overhead of PayPals fees as well for the money transfers. So that amount of money that it pulls in is only a drop in the bucket for Blizz. Heck I say that the box sales of D2, that is if it is still selling would probably outstrip the RMAH in profits.