When working on a project for which you've been invited to collaborate through the "Share with Team" option you'll have the ability to add and remove items and invite via email other accounts to edit the project. The maximum limit of people that can be invited remains 10 (this limit is based on the project, not on each account that can edit it).

What you can't do is: edit the name, description and creator of the project (function "Manage Project"), make it public and delete it. These features are only accessible to the original creator of the Project.