If you're a Prisma fan, you were likely heartbroken when the AI-driven art app lost its Facebook Live streaming feature. Why did it go almost as soon as it arrived? Now we know. The Prisma team tells TechCrunch that Facebook shut off its access to the Live programming kit over claims that this wasn't the intended use for the framework. The platform is meant for live footage from "other sources," such as pro cameras or game feeds. It's an odd reason when Facebook's public developer guidelines don't explicitly forbid use with smartphones, but the social network does state that it's primarily for non-smartphone uses.