Gone are the days when thrifting was seen as something to hide. For young consumers, secondhand shopping has become the way to show off their personal style (while scoring amazing deals, of course). And they’re taking to social media to brag unashamedly about their latest finds—or to get inspo from others’—turning their thrifting hobby into a full-blown content category. Enter the rise of “thrift-fluencers.” These creators are a whole category of influencers who post thrift hauls, give shopping tips, and even sometimes curate thrifted “style boxes” for their followers to buy. And while thrifting is a one-of-a-kind experience each time—based...