The connection between television appearances and new subscribers is historically difficult to track, but WP Curve’s television appearance significantly increased search traffic for branded terms – and search traffic accounts for 42% of WP Curve’s new signups. With TV as their megaphone, WP Curve saw a 27% increase in recurring revenue for in March. Read all about it here.
Once you've tested the entire roster of emails listed above, you'll see that subscribers respond to some emails more than others. Don't be surprised if they're not just looking out for discounts. After all, email marketing is really about building a long term relationship with your subscribers. That kind of relationship-building requires more planning and variety. In return, you'll get better brand recall and customer loyalty.