Because it is more work. I guess that not a bad idea, it would work better if we just presented a random sampling.
But here's the thing. This one is only 18 pages, EP's is shaping up to be only 9 pages. It's not like anyone is downloading a whole book. These are pamphlets really. So if we put out just 3 sample pages (most places I go to usually offer 6 to 8 pages) of EP's adventure, that's a 3rd of the adventure.
I think we do need to mention how many pages these adventures are in the intro. Just so people realize that they aren't getting a full-blown adventure book and they can estimate how much effort it will take to download.
As for having it accessible from a browser, well that is up to Spriggan and Fell. I don't really care, but I'm sure there are file size issues. Usually, all you get is an intro, then you have to pay $20, and then you get to download it. So letting someone peruse the adventure in their browser would be very nice of us.