Ninja
We have tested this feature on a different server with an older version of Adagency Pro and it worked both ways. On joomla websites, we only installed the remote module and it worked. Likewise, on non-joomla websites, we used custom html modules (iframe) which worked as well. Read your own documentation as it says that adagency pro doesn't need to be installed on the other joomla website but just the remote module.