Attacking the market with a low margin strategy has other benefits, though, ones often overlooked or undervalued. For one thing, it strongly deters others from entering your market. Study disruption in most businesses and it almost always comes from the low end. Some competitor grabs a foothold on the bottom rung of the ladder and pulls itself upstream. But if you’re already sitting on that lowest rung as the incumbent, it’s tough for a disruptor to cling to anything to gain traction.