Id like to say that this article alone, proves all of those yelling that NSS does not happen on pennies wrong to a T, it says it clearly in there,
"Because it may take a market maker considerable time to purchase or arrange to borrow the security, a market maker engaged in bona fide market making, particularly in a fast-moving market, may need to sell the security short without having arranged to borrow shares. This is especially true for market makers in thinly traded, illiquid stocks such as securities quoted on the OTC Bulletin Board,5 as there may be few shares available to purchase or borrow at a given time. "