As outlined in our article Does my subscription apply to all sites? all subscriptions are individual to each site and do not provide unlimited use beyond the site your subscription was purchased on. However, if you have an account with multiple sites and would like to transfer your subscription from one account to another, our customer support team would be happy to assist.
That being said, as all of our sites do operate separately, they also have varying subscription fees, which means that depending on which site you are looking to transfer to, the charges may vary.
If you would like to request a subscription transfer, please contact us for more detail.