I wonder, how would this work on, eg an ebay auction or another site where the same content is available at lots of different URLs?
The same auction is available at, eg
https://www.ebay.com.au/itm/1992-WIDGET-THE-WORLD-WATCHER-NI...
https://www.ebay.com.au/itm/113314026367
https://www.ebay.com/itm/113314026367
https://www.ebay.co.uk/itm/113314026367
, and probably limitless other URLs.