I actually think I may have misunderstood, and this doesn't upload to mapillary by default.
...but that said, what is the kind of person to upload specific times and places where they were to a private corporation? What would motivate a person to do such a thing? Can you get paid for it?
It is done for cartographers in OpenStreetMap to map where they have been (or where others have been).
I use it to add metadata to my local area, things like business names, postboxes, benches, etc.
Mapillary is not a private cloud for your own personal Google Street Map. It's a public Google Street Map with appropriate licencing (open) for mappers to add data to OSM, using Google Street Map would be in violation of its licence.
Not to get too snarky, but the number of people that knowingly or not have GMaps location history enabled has to be in huge millions. I talked to a few of them personally and they saw it as some little neat feature to eg. quickly list the cities they've been to in the last year.
...but that said, what is the kind of person to upload specific times and places where they were to a private corporation? What would motivate a person to do such a thing? Can you get paid for it?