The add-on provides 30 connection updates for free every month. For more bonus updates, use the Invite your friends feature. Open the add-on and click on the menu icon in the top left corner symbolized by three stripes next to the logo. From the menu, click on Invite your friends and follow the procedure shown on the screen.
For every friend that installs the add-on, you receive 10 bonus updates, up to 150 bonus updates.
Click on the three stripes to open the menu.
Select Invite your friends to start the referral process.