I work in IT, and different definitions of what SaaS means are starting to wreak real havoc on the architecture as a whole.

We are better served just quitting the acronyms and taking the time to talk about a more detailed description of what the service actually adds in terms of value.

Amazon Prime is a subscription for shipping, video streaming, gaming benefits and more. Since software is not the primary goal, but a means of delivery for these other services, I will not consider Amazon Prime SaaS.