Maybe Kohl's (NYSE: KSS) wasn't crazy after all. Or maybe it was crazy like a fox. In any event, the department store's decision to partner with Amazon.com (NASDAQ: AMZN) and sell the e-commerce giant's products as well as accept its returns seems to be paying off.Rather than killing Kohl's, as has happened so many times when Amazon has partnered with a retailer, this relationship seems to be doing what it was intended to do: drive more traffic into Kohl's stores.Early evidence suggests Kohl's partnership on Amazon.com returns is paying off.