In an exploding resale market, Poshmark’s heavy lifting may be benefiting top competitors ThredUp and TheRealReal. Madewell is filing for an IPO and will be separating from parent company, J. Crew. New e-commerce platform, Verishop, just rolled out free one-day shipping. Plus, Whole Foods announced they will be cutting health benefits for up to 1,900 part-time employees.