Permissions for designated web sites to use the showcase
Vimeo has this feature. The owner is able to designate in the program which web sites are permitted to use the links and embed codes. Those without permission who attempt to include links or embed codes in their web pages receive an error message on their screen stating the file is not accessible. This might be complicated by the 3D Showcase app--but this could be an exception to the permission restrictions possibly--and by MLS and MLS syndications, another exception perhaps for Zillow Triulio, and other syndicators?