OpenCoin has done nothing to earn the coins they're holding back except write code for a concept that may or may not work.
The notion of "earn" is entirely subjective. Plenty of people hold the opinion that the early miners are unjustly enriched.
i still think OpenCoin represents a centralized point of pressure that could be exploited.
I agree. As long as Ripple is closed source and there are not many validators, it is vulnerable.