I'd like to call this observation part of a larger concept - "Explicit Design". It is best explained perhaps by looking at an example that I recently came across:
Nipponia is a type foundry from Japan. Just above the checkout button, there is a little file icon: "NPRQunadoKn2_CompletePack.zip". It's not a link. There is no need to show this but it's there! Why? Obviously, it is deliberately added with some intent.
The intent is that you're paying for the fonts and you should know what you're going to get. It is this extra little level of transparency that I appreciate very much.
But wait, it really isn't quite telling the buyer what they're going to get. I want to know what's inside that .zip file. Scroll down to this:
I love it. I might just buy this 6.62MB piece of "Explicit Design".