Gravano ratted because he feels Gotti was conspiring against him and turned his back on him after all the years of loyalty Gravano gave to him.
If that is true I do not blame Gravano when he was looking at life in prison and taking the fall for a man who betrayed him.
I think this is the reason why he has never been whacked after Pete passed away and John. No one else really gave a fuck that he fucked John over. I bet you most them probably sided with Sammy.
Gotti also brought everything into public view. Ranking mobsters from New York’s five crime families have often cited Gotti’s larger-than-life approach to Mafia life as factors that helped authorities bring down the mob.