Each account plan has a preset number of licenses available to distribute. License usage is calculated on a per-person basis. One organization account can be connected to multiple ensembles and still use one license per person. Members do not need multiple licenses to connect to more than one ensemble in your organization.
A unique set of credentials are assigned to each person granted access to your account. Each person can use the same credentials on multiple devices. However, they will not be able to use more than one device simultaneously to access their ensembles.