The public dashboard urls are rather cryptic. To give our team easy access to them, one simple way of doing that would be to show the dashboard inside an iframe on our company's website.
The same idea holds for making a dashboard available to our customers - we would need and want to host them under our own domain.
I did not really understand why the dashboard would not work inside an iframe - in general web sites simply load. But not in this case - there are some javascript errors and no graphs are shown in effect.