According to AppleInsider reader Gregg, Apple sent out emails via iTunes Connect on Wednesday outlining Family Sharing and asking developers to opt-in to the new program.
Unveiled at WWDC 2014 on Monday, Family Sharing lets up to six family members who use the same credit card to share content purchased from the iTunes Store, including the iOS and Mac App Stores.
As noted in today's email, the program allows family members to share photos, a family calendar and even current their locations among devices registered under a single account. In a bid to thwart litigation, Apple also built in parental controls that allows parents to approve purchases and downloads made by their children. Parents have the ability to accept or reject purchases remotely.
With today's email, Apple is urging developers to agree to the new iOS and Mac Paid Applications Agreement in iTunes Connect regarding Family Sharing. Apparently developers have the option to keep past purchases out of the program, suggesting the same option will be available to future apps as well.