G-mail creates commitment to its service through reducing switching cost which in turn creates value in the G-mail service for the user who is now able to host multiple accounts from one service. This element of G-mail helps secure users once they have decided to use G-mail hence it is affecting a later stage of the Web 2.0 Behavior Chain proposed by Professor BJ Fogg.
Learn to read the numbers in Zome construction system. A Zomeball is shaped like a 62-faced dice. Which shape facing upward, or forming the north pole, dictates the symmetry on the equator plane.