In technology on February 20, 2007 by rajeev kumar
making something restricted increases the curiosity value and gmail has done well about it. In the initial days of gmail launch there was a rush for its account and the invitations were also available for price on online auctions site. Paying for e mail account ! Then google increased the no of persons you can invite to 100.
now creating a e mail account in gmail does not need any invitee . Anyone can go ahead and do it.. read it here