Just came across this article, Investorshub is a forum where restricted stocks (Pink sheets, OC etc) were being discussed. Many of these stocks werer being promoted by boiler room scams. It seems Investorshub were in on the act.
http://wepickstocks.net/content/investorshub-founder-pleads-guilty-stock-fraud
http://wepickstocks.net/content/investorshub-founder-pleads-guilty-stock-fraud