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The entire business model of a market maker is to provide liquidity in the moment to anyone who doesn't want to wait around (which is basically 99% of the population). So all the small fish pay a tiny premium to the market maker in exchange for instant service.

It's when the market makers start trading with each other that things can get weird.

yeah it's a very crazy ripple affect when you buy up a bot's liquidity and it has to figure out what to do.