‘Keep Sweet: Pray and Obey’ revisits Warren Jeffs’ FLDS sect through survivor stories

The glut of true-crime fare is such that streaming services essentially create “You might like” companions to what’s on their competitors. So viewers of Hulu’s “Under the Banner of Heaven” can now watch “Keep Sweet: Pray and Obey,” Netflix’s docuseries about Warren Jeffs’ polygamous sect, a well-covered story already that gains traction here by interviewing many of the survivors.