I love the subversion of Always Be Closing to... always be emailing. This is probably where I've failed in promoting my own book. I haven't kept a list of email addresses of those who already purchased it, though I've heard email is important. Do people tend to respond to crowdfunding emails? This is something I'd love to learn more about.
As I wrote in the isle, absolutely. Crowdfunding emails are super hard to do, emotionally, because it's more of a direct request, rather than just telling the world about it on social media. But they ARE effective.