The data they send is theirs — like Dropbox.
Some at least are updating existing images.
It takes quite a while from the moment the images were captured to seeing them on the map.
You reserve the right to access and change your personal data, aswell as the right to request its deletion within the limits permitted by law.
It goes without saying, therefore, that the imagery isn't real-time, in fact it usually takes several months from when the photograph is taken until it appears on Google Maps.
Visit the and click on the location of the map you want to be updated.