Twitch Updated their Sexual Content Policy:
- Changes: Certain content now allowed with labels
- Artistic Nudity: Permitted under Sexual Themes Label
- Game Nudity: Contextual; labels necessary
- Body Painting: Acceptable with appropriate label
- Mature Games: Label generally covers content
- Stream Visibility: Impacted by content labels
- Twerking, grinding and pole dancing are now allowed without a label.
I don’t think that’s true really, it’s popular because softcore has always been popular and twitch is a great platform for moderated chat interaction and community.