When you add your team members to your workspace, they will have the same plan as yours. For example, if you're on a Pro plan, your team members will also be upgraded to Pro.
But they will not have access to any form/folder on your workspace unless you share those forms and folders with them.
To share and manage folders/forms, follow these steps:
1- Right-click on the form/folder and select the Access Management option.
2- Now you can add your team members and manage the access you want to set for them.
You have 5 types of access:
Read only: The person with this access can only view the form and the responses and charts on it. They can’t edit the responses though.
Read & Edit Responses (rows): This level goes one level further and enables the user to edit/delete the responses too.
Full access to responses + Edit apps & forms: Again, this level has one higher access level enabling the user to edit the logic and calculator of the form.
Full access to responses + Edit & delete apps & forms: People with this access not only have all the above access levels, but they also can delete forms.
Full Ownership: This access level includes full ownership accessibilities. Team members with this access can do all the above + move forms. Only owners can move and delete folders.