I have a friend like that. Incredibly popular woman in our old town. Very pretty. Think curvy Jodi Foster. Her name popped up on my Strava as someone I may know. To this day, I am her only Strava follower.
I asked her if it bothered her to only get kudos from me. She said she meant it to be private for her, but was ok that I was following. Just asked I not share with anyone else.