It was the de facto meeting and exchange place for all things related to that degree and was great value, I skipped quite a few classes that had good material and opted for self study. Must have saved me lots of hours. The most interesting thing was that there wasn't much pure leeching. Most people that used it went out of their way to help new students, provide lessons learned etc. Some professors actually had accounts (sometimes "undercover", was always fun when they got "exposed")
The guy started it when he started his BA (equivalent) and wrote his MA thesis about it and then the side faded away when he graduated (but by then there was other stuff available anyways)
Wasn't sophisticated at all but man was it useful. Talk about identifying customers and fixing their problems :) /old story