I looked some more. Found that the site owner is a web developer (to some extent).

http://web.archive.org/web/*/http://nutrapost.com shows that the original domain was operational between 2002 and 2005 inclusive, and that it's the same as the Yahoo store that you currently see. The owner must have forgotten to renew his domain registration, or something.

The owner (George, or gpr01002) made 38 posts on this forum for Yahoo stores between 2002 and 2003: yourstoreforums.com/search.php?searchid=283309 (you'll need to register to see the posts).

I couldn't find anything on the site being a scam/fraud (using those keywords).

BTW, I have to figure out the payouts today - in the evening some time!

The verdict is in - a very helpful person on Bodybuilding.com tried to order something from there, and his credit card wasn't charged. The website is defunct.