I think its also true that their online retail store created a new industry. They might not be the first online retail store, but they definitely spearheaded the online retail industry. I think the some of the reason why AWS is more profitable or has been profitable longer because.<p>- Amazon reinvested its revenue on its growth.<p>- AWS was a by product of Amazon retail store infrastructure (at least initially).<p>- AWS customer base are mostly businesses with big pocket and less likely to worry about spending money.<p>- Amazon retail store is built on the business of selling products cheaper.<p>- AWS profit margin tends to be higher than retail store.<p>Just thinking out loud.