GRIP global roads database republishing OSM as CC-0?

I just found out via a toot that something calling itself the “GRIP global roads database” is distributing a roads dataset “based on many different sources (including OpenStreetMap)” under " Creative Commons License (CC-0)".

I thought distribution of OSM derived databases had to be under ODBL. Is CC-0 acceptable? Is there something they’ve done to make this a produced work rather than a derivative?

I can’t get QGIS to even open it.


Link to GRIP:

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CC0 is a waiver of any rights they potentially have in the data. It doesn’t make a statement about any potential 3rd party rights.