https://communityhub.strava.com/insider-journal-9/an-update-to-our-developer-program-13428
The gist of it is that Strava just killed its free API, and will now require developers to have a subscription.
At Strava, we care deeply about developers, and the health of the developer ecosystem. There are now 241,000 Strava API developers, up from 185,000 last year. Starting today, all current and future applications will automatically receive access to the Standard developer tier. This allows you to serve up to 10 athletes and start building immediately, completely eliminating the previous queue.
This essentially kills thousands of tools people build using the free API.
If you’re looking to move away from Strava, so far I’ve found two open source alternatives:
There are many alternatives for tracking and analyzing performance data, but I’d posit that that’s not what most Strava users do there. For most of them, it’s a social network, and that’s it’s focus as it goes public. There’s no alternative “athlete focused” social network that allows planning and organizing group activities, has tight integration of activity info (e.g. tracking that the group bike ride averaged 20mph over this route, or that person X and I competed in the same park run, and here’s the finishing time for each of us, along with a few photos and some performance data like pace and heart rate).
All of those I listed have social features