Our subscriptions are paid per site. There are volume discounts available, and for multiple-sites, you might want to check our Branded Moodle App plan.
Volume discounts are available but only for 25 sites and above, you can check the volume discounts here.
If you manage multiple sites, our Branded Moodle App might be you best option:
For multiple sites, this is the most affordable plan.
It supports multiple sites without any limitation or restriction.
Please contact us if you are interested.