First, here's his post.
https://www.facebook.com/notes/richard-garfield/a-game-players-manifesto...
I found it a good read and drew a lot of parallels between it and Spiral Knights. We have power ups, though mostly just sparks of life, incredibly pricey cosmetics, as well as unfair advantages (mixmaster/orbitgun anyone?) in a competitive setting. These things are worrying, but perhaps Grey Havens will be different- all or most of these things were developed under SEGA, including the Golden Slime Casino. It seems plausible that Grey Havens would move away from the old direction? Only time will tell (unless Cronus does or something) of course.
I think that post is 100% accurate, and a good read as well. However, I do not see it as a problem.
As the saying goes, there's a sucker born every minute. Of course, there is an attempt to cover it up as a "medical disorder" like everything these days. Can't do well in school? Disorder. Homicide? Disorder. But this is basic nature. You spend money to get what you want. No one can tell you only to spend X amount. If someone wants to spend $10k on pretty rocks, who's to stop them? The developers did nothing wrong. People need to learn to live with the consequences of their own actions.