A look at TikTok’s effect on small businesses in the US, as the app has become “a billion-person focus group”, disrupting business cycles and corporate R&D (Wall Street Journal)

Wall Street Journal:
A look at TikTok’s effect on small businesses in the US, as the app has become “a billion-person focus group”, disrupting business cycles and corporate R&D  —  The social-media giant has become ‘a billion-person focus group,’ disrupting business cycles and upending corporate R&D