Launched less than a year ago, e-commerce site Temu has quickly established itself as the online world’s new favorite jumble sale—the destination of choice when you’re looking for an impossibly wide array of incredibly cheap products. The Chinese-owned digital flea market, available as a website and in app form, offers free shipping to new customers and constant sales on a vast collection of semi-disposable products. Temu sells everything—car accessories, video game gar, household goods, novelty t-shirts, sex toys, power tools...you name it, they have it, or a cheap facsimile thereof. Because despite its slogan “shop like a billionaire,” you won’t...