From what I have heard the Westie did not kick up $1 to Roy or the Gambinos

They did what they wanted . The alliance probably only gave them a name to throw around or protection when dealing with the Genovese who had alot of influence in that neighborhood and were in a secret war with the Westies . The Westies were crazy but had no chance vs that family , the Mad Dog and his who knows who else were hunting them.

The Gambinos basically got a new murder crew outside the family and probably got some control of them ( ie no more K & R jobs ) . NYC must have been like the Wild West back then, legit serial killers everywhere .