Apple's been doing it for some time in "Others" category (Apple TV, Watch, Beats, Airpods) - it's mere extending of its policy. Furthermore, Apple's been increasing prices of iPhones - which will probably lead to worse numbers - but may lead to greater sales numbers - which Apple feels are much more relevant for investors and for them. It doesn't necessarily have to be a bad sign for Apple, as they always have focused on greater average-selling-price instead of of sold iPhones.