Hello,
To answer your first question, a maximum of 500 Total devices can be registered to one hub. Having other devices registered to the Hub (like an ActivSlate) will count against the Total Maximum.
To answer your second question. Have you tried using the Named Voting mode from within Inspire? Though it is not exactly what you are describing the Named Voting Mode is very similar. A “student database” can be created within Inside Inspire or in an Excel “.CSV” file & then Imported into Inspire. The Database can then be separated into classes / groups for easier usage. Once the devices are registered & the Database has been created you can assign the names in the database / classes to the devices by inputting a Pin code on the device that correlates to a specific name in the list.
Additional details regarding this feature can be found in the help files within Inspire.
If this feature will not work for you or if you would like additional functionality please let us know and provide specifics which can be considered as a possible Enhancement Request to our developers.
Thanks!