When purchasing Hatch theme from the HubSpot marketplace, you'll get the complete theme source files automatically migrated over to your portal.

Each license (purchase) is valid only in the portal it's purchased from. 

If you need to use the Hatch theme on multiple portals, you'll need to purchase a license from each portal.

Things you can do

1. You are licensed to use the Hatch theme on all domains within the portal it's purchased from. 
2. Create a child theme (extending the original theme's folder) to customize its source files.
3. Use Hatch theme as your website foundation and develop new elements/features/modules extending the theme.

Things you can't do

1. Migrate/Clone Hatch theme into a different HubSpot portal.
   HubSpot disables the option/feature to migrate purchased themes to another portal. 
2. You can't redistribute or resell the Hatch theme in any form.