That’s because the social fitness platform is deleting users activities. The new policy, which Reddit commenters seem quite happy about, replaces Strava’s previous process of users flagging suspicious activities. Instead, Strava’s taught a Machine Learning model to detect suspicious activities. Strava says it deleted 2.3 million activities that were improperly categorised as normal rides. Strava didn’t say how many of these improperly classified activities it deleted.