Well, they clearly let you promote frequent linking back to your own site / material, etc., those pdfs, videos, etc.
It's their site, take it up with them bud!
I know there was some notion of an education angle.
Yup, free and thus non commercial.
But, come on, commercial angle was all too visible also.
A. You can't answer the question as to what that would be and
B. With thousands of posts there, the power's to be have no issue with all those posts.
So maybe you should gather up your sizable funds and buy the site then enforce rules you think are better!
Especially, considering that many things could be clarified with a few lines, but instead you are quite insistent, many times, on people seeing those 30+ mins videos from your website / youtube.
Yes, I hold a gun to their heads to view free video's.
You realize your concept and post is absurd don't you? Of course you don't. Why the trolling? Of course you can't answer that question either....