.edu domains have some of the highest authority out of all the sites on the web, and thus a backlink from those domains is typically worth more than a link from common domains, because (in theory) they get extra trust from Google since they usually have no commercial intent.
Things to note:
These links are dofollow
The PR of the pages they're on is 0 because the pages they're on are newly created when you order
These are technically comments but each comment gets its own page, so it ends up being like a blog post
The content used will scraped and spun. If you want, you can provide content for me to use and I will use that instead.
Only one order per URL. I don't have enough unique domains to build these on to do multiple gigs for one URL.