Most people do that ,same at the forum. People offer codes and say something like, get the free $50 pears and such.
He wants better reward for fame by scaming the newbies. The new players are not get what they are promised but non the less get free items.
I do not think you can do anything about it,after all no one force them to use those codes. If it's sound too good to be true, it's mostly fake.