Kevin McGinnis stepped down as CEO of Sprint Corp. subsidiary Pinsight Media and managing executive of the Sprint Accelerator. McGinnis helped found the startup accelerator in 2013, which connects startups to mentors, corporations and other resources to accelerate their growth. In 2014, he took the helm of Pinsight Media, which changed its business model last year to focus on delivering actionable marketing insights to clients. The news came from McGinnis, who announced in a blog that Friday...