Amazon and GoPro have filed a joint lawsuit against a group of Chinese nationals and businesses they allege sold counterfeit GroPro products on Amazon. In newly unsealed court documents, the two companies say the fraudsters made knockoffs of some of GoPro’s most popular accessories that blatantly used its branding to try and trick potential buyers. Among the products the counterfeiters saw to pass off as authentic include GoPro’s signature “3-Way” and “The Handler” grips. The knockoffs were often hard to spot, with subtle differences between them and their real GoPro counterparts. For instance, some had foam handles that were a...