I've done this since day one in my startup (I'm in day 112). Not being a hacker I have to be really careful where to put my dev money, so any automation I might want to do I have to figure out ways to do it without involving the devs (that money goes to the service I'm building) I have a combination of processes: 1. User must fill out a form with their name and email in order to get the download link. For this I use…
Do you have any trouble with people reporting your drip emails as spam? I found that some people are reporting emails instead of clicking the unsubscribe link. Unfortunately, many email clients make that button more convenient than tracking down an uninstall link within the email.
Maybe your emails aren't appreciated in the spirit they are sent. Just because you cajoled someone to check a box to use your site, doesn't mean they appreciate your email campaign.