* One request to create, update or delete a content item on a connected site is counted as one update. Your total monthly update limit is (number of licensed sites) x (update limit). E.g. if you edit a content item on the source site and push that update to 5 connected sites, this will count as 5 updates. Dependent entities like files or paragraphs as well as translations are already included in an update; e.g. if a content item has 10 paragraphs, 10 files and 10 translations, the update of that item on a remote site still only counts as one update.
** You can connect any number of non-production sites for testing free of charge. With the Enterprise package developers can also setup and test Content Sync on their local machine; other packages require the sites to be available via Internet.