Disagree they can be borrowed from existing holders of $SNPW stock.That have accounts with schwab( including TDA because they acquired it previously) And as long as its not in a cash account or ira.etc
Its meaning is simply that if you try and place an order to short SNPW with Schwab, it is unlikely to be filled, because Schwab doesn't maintain a supply of most OTC shares that it could use to short those stocks.