I bought the full version directly via Piggyback. You can download all the map tiles if you know how to do it (whole thing is just a webserver with leaflet, use mitmproxy to change headers, about 5GB in total, the POIs are just some JSON-File), however i'm rating 1 Star because there is no update for Cyberpunk Update 2.0 and i doubt there will be one for Phantom Liberty...
