I agree with Lilo and Oli. And, as Sonny said, Mafia Dons may inveigh against drugs all they want, but they will always turn a blind eye to any money that comes their way. The figure of merit in a Mafia family is that the Don will order anyone who gets caught in drug trafficking killed because that person could be a threat to him if he's offered a plea-bargain. But he's not going to delve too deeply into the sources of money kicked up the line to him.

Ditto Michael. And when Frankie complained about the Rosatos, I read into his remarks that he was qualifying his beef about drugs: "Everything with them is women and drugs...and they leave the gambling for last [emphasis added]." I inferred that if they'd paid more attention to gambling (Frankie's nominal business, which he got tribute from), he'd have ignored their prostitution and drugs rackets.