They recently introduced "Athlete Intelligence" [1][2] feature that wasn't received well by users so I'd guess this is a pr stunt so people would forget about it

[1] - https://www.forbes.com/sites/cyrusfarivar/2024/10/12/strava-...

[2] - https://communityhub.strava.com/t5/strava-features-chat/opt-...

The original find is from Le Monde. It's not a leak, just usual investigations.

not a data breach