Waitaminit.... I thought this MMORPG was different! I thought you were gonna pay ME to play!
After all, I'm so special and my pooh don't stink neither!
Sarcasm aside, an open source project is bound precisely to the amount of customer service cited in the license agreement. To my knowledge, there's no difference between the people who create the game and the people who play it, in this regard, because the people who play can do what the people who create it did, and download the sourcecode.
On a website today, I saw a young gal talk about how "some third party" should take the fruits of each person's efforts and redistribute it "from each according to his means, to each according to his needs"... and then proclaimed *that* "freedom".
As XilliX said, if a person invests his irreplaceable time, if he invests the one thing that is truly his, his effort, and contributes his unique creative abilities to produce something, whether it be a desk or a symphony... should anyone else demand a right to the fruits of that labor for whatever reason, they are demanding a right to enslave that person, nothing less!
If that person willingly shares those fruits, as I believe most people would, then it should be on his terms.
No one is required to play PS; they should play PS because it's fun. At this stage, PS is incomplete, and faces challenges and limitations commercial efforts with lots of money (tens of millions of dollars) thrown behind them don't face. Some of the team are doing it for the fun of creating/running an online multiplayer world. Others are doing it in hopes of learning things. Still others hope to pad their portfolio so they can get a job doing what they love to do. Most I imagine are doing it for all these reasons and more besides.
Nobody should have to kiss their backsides for doing this. But nobody should expect the developers/GMS to kiss their backsides, either.