Such is the case with the collaborative mapping project OpenStreetMap (OSM).

FORBES: Why OpenStreetMap Dropped the Creative Commons License

On the other hand if the data had been dual licensed to the OSM Foundation or me personally then we could have switched the license much more quickly.

FORBES: Why OpenStreetMap Dropped the Creative Commons License

That meant that anyone could copy OSM data, but if it was incorporated into another project, those same terms and conditions applied (ShareAlike) and the copyright owner had to be credited (Attribution).

FORBES: Why OpenStreetMap Dropped the Creative Commons License