(Quoting the NY Times story):
The livestream apps downloaded from Apple and Google illustrate an even darker aspect of the social media technology boom, particularly for children living in poverty in developing countries. There, with the ease of a smartphone, parents and other adults can connect with pedophiles in the United States and elsewhere who pay to watch — and direct — criminal behavior.
Trigger warning: This Times story includes descriptions of child sexual abuse.
On These Apps, the Dark Promise of Mothers Sexually Abusing Children [The New York Times]
Meanwhile, they ban apps that are basically news-sites.