The difference between Mapillary and OSM is that Mapillary is a for-profit company, while OSM is an open dataset managed by a non-profit organization. The OSM Foundation can't sell its intellectual property rights to a for-profit company like Facebook without violating its mission statement:[1]
> The OpenStreetMap Foundation is an international, not-for-profit, democratic organisation with the tasks of supporting the OSM project, running and protecting the OSM database, and making it available to all. The OSMF membership is open to all who want to support the project and participate in the OSMF’s democratic process.
> The OpenStreetMap Foundation is there to protect the OSM data to keep it Free and Open.
Mapillary had always stated in their terms that any street imagery contributed to them belong to them. They then relicensed the imagery to be used for OSM contributions and other non-commercial purposes free of charge, but charged for commercial use. When Facebook acquired Mapillary, they obtained ownership of all of the contributions for their own use, but also relicensed them to be available free of charge for both commercial and non-commercial use.[2]
Many Mapillary contributors like you did not want Facebook to obtain the data. Since the OSM Foundation is non-profit, a similar situation would not happen to OSM as long as the OSM Foundation continues to be governed by people who have the best interests of the project and the community at heart.
> The OpenStreetMap Foundation is an international, not-for-profit, democratic organisation with the tasks of supporting the OSM project, running and protecting the OSM database, and making it available to all. The OSMF membership is open to all who want to support the project and participate in the OSMF’s democratic process.
> The OpenStreetMap Foundation is there to protect the OSM data to keep it Free and Open.
Mapillary had always stated in their terms that any street imagery contributed to them belong to them. They then relicensed the imagery to be used for OSM contributions and other non-commercial purposes free of charge, but charged for commercial use. When Facebook acquired Mapillary, they obtained ownership of all of the contributions for their own use, but also relicensed them to be available free of charge for both commercial and non-commercial use.[2]
Many Mapillary contributors like you did not want Facebook to obtain the data. Since the OSM Foundation is non-profit, a similar situation would not happen to OSM as long as the OSM Foundation continues to be governed by people who have the best interests of the project and the community at heart.
[1] https://wiki.osmfoundation.org/wiki/Mission_Statement
[2] https://joemorrison.medium.com/why-on-earth-did-facebook-jus...