An Instacart founder shares his sneaker test for entrepreneurs

Max Mullen is the cofounder of Instacart. Sam Barnes/Sportsfile via Getty Images Instacart cofounder Max Mullen said dirty sneakers can be a sign of dedication in founders. Mullen said a founder's shoes can show their commitment to their startup. "Real builders," Mullen said, "don't have time to buy nice sneakers." A quick fit check can tell Max Mullen much of what he needs to know about a founder. The Instacart cofounder — also a prominent seed investor who has backed over 100 startups — s...