That is a good question and maybe somebody on the

That is a good question and maybe somebody on the board can answer that better than I can. I believe that OTC traded stocks are relatively difficult to borrow and may make them much higher risk then shorting NASDAQ traded stocks (for example),

I don't know if there is any reason a MM could not accept large blocks of formerly restricted shares with instructions to sell them within a specified price range. The MM could then manipulate (keep liquidity) in the market by simply controlling the quantity of block held shares "sold" by MM's into the market. Remember that these shares were originally issued at .0001 making the upside very attractive to insider share holders. This dilution can have huge price action risks to retail shareholders (us) and IMO is one of the big reasons institutions stay away from large share structures and particularly when insiders begin to sell off large blocks when still in a early startup phase. The flip side is that insiders can sell these shares and recirculate the capital to finance the next stages growth. MM's always need to balance retail consumer transactions with insider shareholder stock sales to prevent liquidity loss and will buy and sell to each other just to maintain that liquidity. If anyone cares to add to or correct any or all of the above please chime in here.