Free Users have access to all the cards you create, which live inside the Supered Base. They do not have access to embeds, process rules, updates, or other features that go into the UI of the applications you use with Supered.

The Supered Base is the chrome extension that houses all the cards and lives on the right hand side of your HubSpot.

You can activate more URLs by going to the "Extension" settings and adding in additional URLs.