If you rely on Facebook or Twitter, you are at the mercy of them allowing you to talk to your customers. When you email it gets in your customers inboxes. Then it’s up to you to make sure you are sending things your customers want to receive. Email is the most scalable way to make sales with new customers and build deeper relationship with deeper customers. AppSumo.com is a 7 figure business and 90%+ of our revenue comes from emails.
A lead magnet (a.k.a. an optin bribe) is something amazing that you give away for free in exchange for an email address. This doesn’t have to cost you anything to create; most lead magnets are digital materials like PDFs, MP3 audio files, or videos that you can create yourself at minimal or no cost. It can be absolutely anything you want, so long as it provides value to your visitors for free.