Because making an MMO became a way to extract short term profit from a growing player base. Basically the success of WoW gave rise to quick hitters looking to cash in and get out. You good and damn well know the ROI decks look like an exercise in risk analysis and payback cycles of how little can we do and still make a boat load of money...fuck the consumer, they are sheep to be fleeced.

Now its Cash Shops and MOBA's that are the flavors. For fucks sake look at the Steam store, that is a case study in the decline of Game Development as an art form and skill set.

Don't make me have'ta Troll ya Bro!