Giga Bytes and cloud space.

Gigabytes
http://youtu.be/nVywwRV7bm8

For typical users profile measured in GB.  The Gigabytes was introduced primarily to depict the calculation of any users total worth or size a user has in cloud on the net.  It is direct relation to how much active profile to ones actual activity via popularity on the users accounts such as facebook or forums particapation.