Trading Commodities 201

Wait a sec here. NYMEX only has $10 *MILLION* set aside in case their customers default???

http://www.nymex.com/jsp/news/press_releas.jsp?id=pr20040212a

I don't really understand what NYMEX is. It's a public company then, correct? So it takes orders from its shareholders then, which are probably mostly large commercial banks.

So, the commercials are in a position to dictate rule changes on the NYMEX exchange?