To add a current day example:
Jay-Z and Beyonce's child has their Instagram professionally done: https://www.instagram.com/blueivy.carter/?hl=en
Jay-Z and Beyonce's child has their Instagram professionally done: https://www.instagram.com/blueivy.carter/?hl=en
Even Instagram only, average wealth, influencers, making like $1M a year or so, have whole teams of people working for their Instagram.