My 1.5 cents:
"Well - maybe they don't feel comfortable sharing their income with a stranger
"
I really do not know what the reluctancy is for posting your profits/losses. These forums are fairly anonymous, are they not? Who cares if someone here know's how much you make or lose? Yes, we are strangers, and to me, that makes it all the easier to say how much someone makes or loses. So what? You do not know my real name nor will we ever meet in person.
Ed