You forget the it's implicit in Amazon's service(at least in the early ears) that no major competitor will use their services out of care for data privacy, reli

You forget the it's implicit in Amazon's service(at least in the early ears) that no major competitor will use their services out of care for data privacy, reliability, etc. So Amazon gets the best of both worlds:leading eCommerce and leading cloud(while "hurting" other cloud platforms who might help competitors). Such strategy could also work well for others - if Intel offers fab services but doesn't sell to pc/server competitors ?