Are They Paid?

Here is a headline in today's International Herald Tribune:

E.C.B. Under Pressure to Ride to the Euro's Rescue

The ensuing article is underpinned with opinions vouchsafed by various worthies. Thus:

• “With the euro-area crisis deteriorating, there is a lot of pressure on the E.C.B. to act — but in our view it is unlikely to announce any specific new measure this Wednesday,” Silvio Peruzzo, an analyst at Royal Bank of Scotland, wrote Monday in a note to clients. 
• “There is a difference between what we would like the E.C.B. to do and what will actually happen on Wednesday,” Jens Sondergaard, senior European economist at Nomura, wrote in a note to clients.
• “As with so many of the euro zone crises,” Ian Bremmer, president of the Eurasia Group, a consulting firm, wrote in a note Monday about efforts to find a solution for Spain, it is “a longer, messier, more painful process than you’d like.”

I was just wondering whether these and other experts get paid for giving their opinions or whether they offer them out of the kindness of their hearts. If payment is involved, does it extend to experts requesting "anonymity because of the sensitivity of the situation"? Incidentally, this latter phrase must now be one of the most commonly used in journalism, along with "could not immediately be reached for comment".