For us, you can buy anything under one plan which can be integrated under one organization. If you are responsible for more than one organization, then you need to create one organization for each business and you can be added to more than one organization with same credentials.
Our integrations are dynamic in nature. The mentioned offerings are the cumulative possibilities of the platform (actual scenarios are specifically organization/business-dependent). For any disparity, please refer to the latest version of the integration brochures.