REUTERS - One of China's biggest exports in 2023 will be its social e-commerce phenomenon. TikTok, YouTube and Amazon are among the companies rolling out features that blend online sharing and shopping. TikTok introduced the concept in the US and UK to replicate the success of Douyin which enabled goods valued at $119B to be sold in 2021. Amazon recently unveiled its own copycat, Inspire. OnlyFans, a video service known for its sexual content, also allows creators to sell personalised merchandise to subscribers.