Lock any file so that it requires a registration code, then distribute it on the internet. People can join your opt-in mailing list in order to receive the registration code. Generates viral mailing list signups that increase exponentially as your product is used.
Platform Windows NT/2000
Operating Systems Windows NT/2000,Windows XP,Windows Vista
Date added 22 Aug 2009
Last Updated 24 Jan 2011
Tags boomerang, listbuilder, email, opt-in, mailing list, promotion