You say it is contrary to the stated purpose of Kickstarter. Can you link or quote something to back that up? All I've ever seen them say is that it is a platform to fund creative projects. This is a creative project.
For game developers, even millionaire game developers, Kickstarter offers some level of freedom from real big bilion dollar game publishing corporations. So even if Richard Gariott has a lot of money, maybe you can at least appreciate he is a little guy in the context of the game publishing business.
The same reason blatant scams get allowed, kickstarted has a significant financial incentive to allow as much as possible. Why would they shut down a kickstarter that will put $50,000 in their pockets?
How does that possibly fit with your claim that it is against the stated purpose of Kickstarter? Kickstarter gets to define what their purpose is, and their actions are as clear as their words. You'd have stronger ground complaining about Kickstater than this project.
For game developers, even millionaire game developers, Kickstarter offers some level of freedom from real big bilion dollar game publishing corporations. So even if Richard Gariott has a lot of money, maybe you can at least appreciate he is a little guy in the context of the game publishing business.