A good way, and an easy way, to build relationships with your subscribers… Send them a birthday greeting… This year I received four such cards (one actually a physical snail mail card) from companies that I’m a regular subscriber to.
This makes a subscriber remember your brand and appreciate the ‘relationship’ that they have with you.
The best part is this can be an automated message, but the thought it nice. Kind of like saying thank you to a customer.
A little thought and time to remember your subscribers goes a long way and remind them that they are not just a piece or electronic data in your companies computers some where.