Man I'm not gonna get into that shit storm again. Fosco maintained that because he hadn't participated in any killings, that he wasn't made. Which is borderline preposterous, because Marco was most certainly a hard ass back in the day, he was most definitely a tough guy. Maybe he never wanted to be and he answers to Pete DiFronzo, who we know For sure is made. Highly unlikely. Point is, he's about as high up in the organization as you can get and rubs shoulders regularly with guys like Inendino & DeLaurentis, the DiFronzos, etc, so it's pretty irrelevant.