The retention rate is terrible, and a significant section of the playerbase that is still actively playing this game is from Asia, predominantly China I presume (You don't really need inside numebers, just check Steam online players for different time zones).
DLC model is still foreign to most average Chinese players. You know, the 'filthy casuals' who purchased the game thanks to marketing, peer pressure, and innocent enthusiasim for the setting. They played for a few hours and leave, and they never post on gaming forums (doubt if they even care to know any). They are the main purchasing power here. If CA ever made a 3k saga, these players would more than willing to pay for that, especially if it could be noticeably cheaper. Less input for great potential output, good business prospect.
Disclaimer: I do not hold a grudge against casual players. I am personally a hardhore strategy and RPG fan, but a total casual for quite a few other genres. It's definitely disheartening for me. But I think it's a great oppurtunity to remind the core community that CA is a big corporate, or at least part of one, operaing in a market economy, not your friendly neighbour's small business that you need to support in exchange for goods with love.