The "move fast and break things" motto doesn't mean actually "breaking" things. It means not being afraid of mistakes, because things that are "broken" or "wrong" can be fixed down the line.
In this case, Amazon is exhibiting not being afraid of releasing a possibly unsuccessful product, because they know they can iterate on it (or pivot, or exit entirely) later on.
In this case, Amazon is exhibiting not being afraid of releasing a possibly unsuccessful product, because they know they can iterate on it (or pivot, or exit entirely) later on.