 Some Big Box Club members are threatening to quit over a new fee. Free shipping is ending at Sam's Club for online orders under $50. Beginning August 19th, the flat rate fee will be $8. The pushback's been growing on social media. One ex-post accuses the Big Box chain of taking away benefits. Others threaten to take their business to Costco and even file a class action lawsuit. Sam's insists it'll make it easier to get