Marcus Robinson, a 29-year-old fashion designer, created a Red Note account to share his thrifting adventures and promote his clothing company, P-13. He previously had accrued 21,000 followers on TikTok, and estimates that 40% of his brand’s sales came from that app. “I thought I was going to keep building and make a living ultimately,” he says.

TikTok could be outlawed in the U.S. as soon as Jan. 19 over concerns about its Chinese ownership, unless it gets a reprieve from the Supreme Court or if Beijing-based parent company ByteDance complies with a federal law forcing it to sell its stake in the app.