Facebook has stringent rules for advertisers to keep newsfeeds from turning into "make-money-fast" pyramid schemes. Basically, they protect against potential fraud by banning claims that can't be substantiated, especially when it comes to financial claims.
I just got served this wonderful sponsored Twitter post... apparently the same rules don't apply for Twitter ads:
How I make $200K a month in my coaching business (and you can too) http://t.co/IKPB2tmArO — Russell Ruffino (@RussRuffino) November 20, 2014
And why yes, I would love to make $200k per month... thanks for asking!