Difficult to find any information about their « loyalty program »: after 12 months subscription to the service you are rewarded with an instrument of your choice via the loyalty program. But, I seems that there is no way to download a plugin, you can only access one forever… forever? well… not sure… I found this in a Roland FAQ:
What if one of my Loyalty Program reward instruments is removed from the Roland Cloud catalog–can I choose another one?
So, they consider that « your » reward instruments accessible forever could be removed from the Roland Cloud. Great
Definitely not for me