It also has a setting for private and public workouts that can be set as default. Whether or not a private workout adds to global heatmap data, I am unsure...
It does not, nor will it count towards challenges, so if you’re into that (which I am so I can’t really fault anyone else) you are incentivised to be public
I call this data scrapping .. two sets of data, and making correlations is my primary job function. I can't tell you how easy it is to take static data and make it dynamic with a series of algorithms that are well thought out, for correlation longitudinal goals.