Definitely all in the perspective, though of course the premium paid for more RAM does not necessarily represent an accurate extra cost incurred by the provider

Definitely all in the perspective, though of course the premium paid for more RAM does not necessarily represent an accurate extra cost incurred by the provider. Amount of available RAM is very often pretty far disconnected from the cost to provide the good or service and is just acting as a price tiering mechanism. This is true for cloud services as well as other things like cell phones (eg. the 2*X GB version is often significantly more expensive than the X GB version, way more than the cost of the extra memory alone would warrant if you just considered the cost of the chips).