Dont forget the best method in the world ever. Works best for morons and retards. I personally know lots and lots of people on here willing hand out their e-mail addresses and passwords
Bebo, WAYN, and all those retarded little things wher eu sign up to sahre pictures or some crap, and you give them your username AND password, they access ur inbox, help themsevles to all the e-mail addresses and the cash rolls in.
I used to work in a job performing mail-outs for a company, and the marketing director would buy around 1000 postal addresses and 1000 E-mail Addresses a day to send thigns to. Postal addresses cost about £3 each E-mail addresses 50p or so.