FBA only exists because market dominance makes FBA style shipping arrangements profitable. Without Amazon's scale and marketplace dominance, that shipping and pricing doesn't work.
Market dominance exists because they offer a better service to the customer. It's not like Amazon has always existed in Italy and always had a dominance position. They gathered their position because they offer a better experience and people are willing to pay a premium for that.
Isn't it the opposite? They have so much money from other markets, that they can take over a new market suffering losses for years, but pushing out everyone else.