No, it's because Transat gives them seats that are "non-risk" whereas they are on the hook for the entire aircraft when they put an A330 on with SSV. This summer, Transat will only fly two Italian destinations for SQV / ALB, SUF and PSR. The remainder of their passengers will fly on Alitalia. The pricing Alitalia gave them is ridiculously low given that airline's notoriously high cost structure. Alitalia is simply trying to limit competition and sell seats that would otherwise be empty.