Good ideas and conversation. No ads, no tracking. Login or Take a Tour!
I agree with both and you that as long as the materials are relevant and that the submitters are sharing their work then it is perfectly fine. But if the submitters are only submitting links back to their own site(s) without any other contribution, then I think they are nothing more than spammers trying to game the system.
Examples: http://hubski.com/pub?id=14610
http://hubski.com/pub?id=14609
http://hubski.com/pub?id=14608
http://hubski.com/pub?id=14552
http://hubski.com/pub?id=14551
http://hubski.com/pub?id=14550