Currently, nothing in the Multi-Portal Sync Integration code looks at what hubs are in the mother portal and what hubs are in a child. It adjusts accordingly. There are no issues with everything the app can currently do, and new iterations are always in the works. In addition, HubSpot tiers only matter from the standpoint of count limitations. An Enterprise mother portal may have 10 custom pipelines to send to the Starter child, but only one will be created in the Starter because starters can only have two, and all portals come with a default pipeline.