Personally, I've never trusted the Market Maker story, being that they provide stability and liquidity to markets. I think the are more often the tool of fraud and manipulation, like Enron did with energy commodities.

I once lost $80,000 if a fraction of a second, pre-market open, on a small pharmaceutical company when bots dumped the stock. A report for a delay in FDA approval had been release at 8:00 AM Eastern, and by 8:00:20, the stock lost 70% of its value. Since the stock was 80% owned by large institutional, more shares had been sold than should have been available. "Market Makers" were, I believe, naked short selling, that is, selling shares they didn't have, in order to tank the stock and then keep it down for weeks. After that, nobody wanted the stock and I never recovered my losses.

Hopefully, the same thing doesn't happen here...