Market makers buy and sell stock and get paid to do it. They make small amounts of money on almost every trade, all day long. They generally don't care whether a stock goes up or down as long as it's trading. An exception is with an obvious scam, where they may keep an open short position knowing that the stock will drop.
The people to whom you should be directing your ire are the experienced traders and funds who manipulate the bid and ask through their market makers.
I don't think anyone is "working the PPS of CTDH" except small traders.