Morale servers make them more money and that's why we keep seeing a lot more of morale. Most players that use premium gold, buy and use it up most of it at the beginning of the server because that's when they are using gold to cut build times or better still extand the premium features like administrator months in advance to stop themselves from getting into the habit of cutting build times (amateurs
), now morale is a great way from them to make those players quit once they have used up their gold and start fresh on a new server server so they can extract the maximum amount of money from them all over again.
It's like apple could so easily make iPod earphones more durable but they won't because they make too much money from people having to buy replacements, Inno is no different morale is their equivalent to earphones because it gets really bad once you have 10-20 cities so most players feel the need to quit or start on other servers> I assume releasing a one morale world after another is to bait those who try to avoid these morale worlds because they know people are inpatient and there is only so long a player looking to start a new world will wait before they take the bait.