Over the last year, these online witches have been credited with saving weddings, securing jobs, influencing basketball games and sparking outrage after Charlie Kirk’s death.Katie Begley needed “some good juju” this summer. Begley, a New York-based content creator and fitness instructor, was waiting to hear back about several big work opportunities, including a potential Little Caesars commercial with Philadelphia Eagles running back Saquon Barkley. So she turned to a figure praised online for offering low-stakes help for the price of a latte: an Etsy witch. “It can’t hurt. I love witches. I love magic. I love all of that,” Begley,...