I send out a newsletter roughly once a month, and the occasional separate message if there’s a special deal going on. My newsletter contains updates on the Grindhouse Horror books, flash fiction, and subscriber only deals & offers. Plus, a few times a year I write an exclusive, ghastly short story just for my subscribers.
I won’t spam you or send excessive emails bugging you to buy stuff. If I have limited copies of something or other subscribers will be the first to know!