If everyone that visited your site invited others you would grow much faster. Imagine if each registered person to your site cost you $1.00 and they each invited 10 friends and 1 joined, your cost is no$.50. Tell-a-friend has been around forever, but that’s not enough. You need each visitor to send emails to their friends by simply logging into their email account – checking off who to send to and done. Take a look at the Viralinviter, it does it all for you.