Emily Swift has a lot riding on TikTok's ability to stay accessible and legal in the U.S. Swift, who spent her pre-Covid years as a Connecticut-based photographer, now runs a business called Darkslide Film Lab that scans and develops film by hand in a traditional black-and-white darkroom. She also posts TikTok videos about the process. When one goes viral, client orders for Swift and her one part-time employee come pouring in — leading to upwards of $6,000 in extra revenue per month, according to documents reviewed by CNBC Make It. Nearly five million businesses have TikTok accounts, according to the...