In reality there isn't a distinction between "market-making" and what you would consider "beating the market". Market makers employ the same models and approaches as those who "beat the market", because market makers need to know when and where to quote in order to maximize profitability. And people who classify themselves as those that try to "beat the market" also provide liquidity, making them de facto market makers, even if they often take liquidity too. So, people in the industry don't attempt to draw a clear line between the two categories, because they are so overlapping in practice.