At first I believed that the revenue stream was like this: 1) ppl give their e-mail address 2) you scan the attachments (eg. words, subject etc). 3) you create

At first I believed that the revenue stream was like this: 1) ppl give their e-mail address 2) you scan the attachments (eg. words, subject etc). 3) you create a database 4) you sell the database to advertisers (that already have my e-mail address and can enrich their data).