““TaskRabbit has 25,000 contractors, about 10 percent of whom rely on it for full-time income. Founded five years ago, the company has almost $38 million in venture backing. Arun Sundararajan, an NYU business professor who studies emerging digital economies, said it's not possible to determine whether the complaints are from a vocal minority or represent widespread dissatisfaction. "It seemed like (the new model) was a necessary shift for TaskRabbit to grow, but they may have underestimated the extent to which providers and clients felt a sense of ownership over doing things the old way," he said. "In any marketplace, the people who are trading start to feel engaged with the process they have learned.””