Nobody is really going to give you 1 GB Mail Box.

GMail, thousands of users signup for 1 GB Gmail account. I too signed up. I always keep my mail account clean, that is delete all unwanted emails when ever i get time. So the usage is below 10 MB.

I am sure most users who care about there email id will do this. Only few subscribe to hundreds of newsgroup and newsletters filling up the mail space, any mail service providers know its better to ban such users. Every provider need users who is serious about the service and not some one who store junk in there server.

100 GB per user, that is just part of marketing.