IHGP - I have a feeling you are right. Zecco uses Penson also. It is Penson that has placed the restrictions on Zecco Traders. Also, UBSS was busted by the SEC and FINRA for naked short selling and not reporting their short interest and short volumes correctly. Of course UBSS paid the $20MM fine and admitted no guilt.
Wouldn;t doubt if many of UBSS's target naked short sells and unreported short sales were OTC stocks such as IHGP.
It is time for the DTCC, FINRA, and the SEC to order buyins and force abusive market makers to cover their shorts or locate shares to borrow against.