Temu and Shein have rapidly gained popularity in the U.S. e-commerce market, surpassing major apps like Instagram and WhatsApp shortly after their launch, primarily by offering extremely low-priced goods from China. Their growth is supported by a trade loophole known as the de minimis exception, allowing duty-free entry for packages valued under $800. Amazon's David Zapolsky has expressed concern over this trend, suggesting that it raises questions about the sustainability of Chinese companies' business models and the enforcement of pricing regulations. As tech earnings season unfolds, investors are closely monitoring how Temu and Shein might impact the financial results of established players like Amazon, eBay, and Meta. The ongoing competition from these discount apps, coupled with TikTok Shop's introduction, indicates a significant shift in the e-commerce landscape, potentially challenging the dominance of American firms. Industry analysts speculate that factors like shipping times and product quality will ultimately determine the long-term success of these emerging competitors.