Electronic dance music has a long, sordid, and intimate history with the drug sometimes known as Molly, as P. Nash Jenkins recently documented for The Atlantic. But one of the problems for these drug/music enthusiasts is the subtle and blurry difference between MDMA (methylenedioxymethamphetamine—an official, chemical name) and derivations thereof, like Molly and Ecstasy. Questions of the drug's "purity" run rampant, and what people are buying at festivals is often cut with other substances.
In a video from NowThis News, a former dealer details his business strategy for selling to EDM fans—mostly paying promoters to let him sell at events, or getting female promoters to sell the drugs for him. He also debunks the idea that getting the drug in powder form means it's purer, saying "it's advertising. We advertise it as pure. I could put a pill in a blender and call it pure Molly. No one's going to know."
Hamilton Morris, science editor at Vice, weighs in as well, saying that Molly often contains not MDMA, but methylone, an inexpensive close cousin which has similar effects.