Shotfarm gets better and better as more people join, so you should invite early and often! To send invitations, go to the Settings and Invitations tab and scroll down on the My Settings page. You can invite any of your co-workers or external partners to join shotfarm by sending them an invitation. Just enter a custom message (optional), paste in their email addresses and click the Do It button.
You can also Grant or Request Permissions at the same time you send invitations by checking the appropriate box. If you Grant or Request Permissions from a company that hasn't yet joined shotfarm, it will be logged as pending and once that company joins, your action will be carried out.