The third time really has been a charm for Sandi Lin and Jason Stewart. The entrepreneurs began their startup journey in 2013 when the former Amazon employees launched Everpath, a Techstars Seattle company that tried to build a Yelp for online classes. They soon pivoted and began targeting independent instructors, offering them a platform to host online education. “I call those my first two failed startups,” Lin said this week. It was the third evolution of the original idea that really took off.