La Cosa Nostra makes money from "illegal" activites called by The Law. I wouldn't like to work and be known as a loser in society. Cosa Nostra is unique and different. They are atleast named in Newspapers, Courts and named by top members in the American government. LCN was a bunch of brothers, you don't give up your brotherhood no matter what. Snitching to save yourself, no one is better in that life. They do everything illegal and murder people together too. Most of those guys grow up together and what they've been through is worth selling out?