Clarification - oneFN Makes Things Up
According to Jupiter Media Metrix, the announcement was a "misuse of JMM information."
Indeed, Jupiter Media Metrix says that OneFN boasts 4.3 million unique users, but because oneFN is a network it does not compare to CBSMarketwatch - a single website - with 3.9 million unique users.
The two properties are ranked in separate categories by Jupiter Media Metrix and should not be compared. Therefore, OneFN's claim of unseating CBSMarketwatch in JMM's Rankings is untrue.