Correct. NITE is mostly an automated ECN. See quote below:
"Market Makers (MM) : These are firms who agree to provide liquidity the the given market. Penny Stocks liquidity are commonly controlled heavily by some market makers. By making a market for you to trade stocks they are “market makers”. They earn their money my profiting off the differences between the bid and ask prices of a stock. See the market makers for more information.
Electronic Communication Networks (ECN) : These are automated systems designed to match up buyers and sellers of a stock. Examples are: NITE, ISLD and ARCA.
Wholesalers (Order flow firms) : Some online brokerages have relationships with market makers or even a large group of market makers. If there is a need to handle a large amount of orders a brokerage may decide to use a wholesaler to execute the trades on their behalf.