Here’s an interesting ‘Subscription’ tool that one can now use on Twitter. The below is what Twitter calls a Lead Generation ‘Card’ that enables any Twitter User to collect an Email Database from his/her followers using Twitter for FREE. The Card (as seen in the below screenshot) is connected directly to our Google Spreadsheet that collects & stores all emails collected through this method. The Google Spreadsheet can then be used to Send Email Blasts to Subscribed Users or downloaded & added to your existing database for other uses.