Anyone is free to believe whatever they want to. I live in NY. I know people that work on the trading floors, and I am good friends with a girl that had a very high level job in a market makers office. Everything I have posted is exactly how things are and how they work. Believe what you want.
...by keeping the Buy & Ask close together ..think .. Horsetrack betting ..2/1 odds on this one ..7/1 ...etc ...the closer the odds ..the least chance of the oddsmaker getting wiped out....you pay more for 2/1. Biggest money (commissions for the track) sits at 2/1 ..insider news ..can change the odds.