Even though you may follow many public figures online, you don’t always keep up with them daily or even weekly.
Enable public figures to allow their fans to follow them geographically, so when they visit a city their local fans get an alert.
We could always find new interesting people to learn from. New authors, experts etc.
Share what you have learned from someone else, someone public and accessible who you think others might find beneficial if they discover. Write a short post about what you have learned from them and some links to their online presence.