A Squore administrator may allow you browse a list of projects created by other users so you can contact them and request to be added to their project's team. When this feature is enabled, you can click the Ask access to Project Owners button on the My Projects page to view a list of projects that other users have created, as shown below:

The list of available projects on the server and their owners

If you want to become a team member of one of the projects listed, click the project owner's e-mail address to send them a message and request to be added to their project's team.