Epic, Apple and Google are in a feud over the game Fortnite. In mobile apps, whenever you buy a digital item, like an e-book, avatar skins or weapons, Google and Apple charge a 30% fee on that purchase. Recently, Epic started letting players buy in-app purchases on their credit cards so Apple and Google wouldn’t get the fee. Apple and Google both yanked Epic’s game Fortnite from the App Store and Google Play. Epic sued, saying these digital fees are antitrust violations. Molly Wood speaks with Nicole Carpenter, the deputy news editor at the gaming news site Polygon. She says this is about more than just Fortnite, especially on iOS.