the situation between rizzuto's in montreal wasn't the same as say some of the 5 families having large strong crews in NJ,florida or springfield mass.
the rizzuto's were and to some extent still are a global crime family w/ connections all over the world with a variety of different criminal groups.
any tribute they sent to NY was probably designed to appease the bonannos to be left alone.
after murder of gerlando sciascia that tribute stopped(1999).