10 Gb Mailboxes! a Revolution in Mailbox Sizes?

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10 GB Mailboxes! A Revolution in Mailbox Sizes?
1. There are two kinds of emails: Private Emails & Public Emails. Private Emails are the emails you send to your wife, friend or business partner. They should not be read by any other person. Public Emails are the emails that news agencies, news papers, TV channels, corporations, etc. send to their subscribers to tell them about latest news, views, prices, etc. These emails although having same text & content are sent to many persons maybe up to 10,000 or even 100,000.
2. Public Emails are applied for by many users, so many copies of public emails are stored on the hard disk of any internet based email service provider (MSN, Yahoo, AOL, etc.) The storing mechanism seems to be like this: Dedicating a folder on the hard disk of an email service provider to each user & storing all emails of users in their specific folders, the contents of which are displayed whenever users sign in their mailboxes & a database verifies their usernames/passwords. Under this mechanism 100,000 same newsletters are stored in 100,000 different folders; if 100,000 users apply for the newsletter.
How uneconomic! Just imagine that this mechanism be substituted by another that rely on only one copy of a public email for everyone's use, it will be a giant step in reducing the disk size needed to save data so it will result in much larger mailboxes (probably up to 10 GB ! or even more!)