Unlike most in this thread, I believe the argument from Strava is valid. Relive built their brand, app, and community of users on top of Strava, they now are usurping those users and have re-created a complete app ecosystem which mimics much of what Strava already provide.
In my personal opinion, the world doesn't need another fitness tracking app or community. There are so many out there already. What we, and to a lesser degree Relive, provide can be so much more.
Though we look like a sports tracking app, because that is a large volume of our usage, we also have business in commercial drone operations, wild life research, city planning and more.
I'm from Whistler, Canada, so I love outdoor sports, but that doesn't mean that every feature should become a fitness tracking app.