I happened upon Readfree.ly a couple of days back after seeing an author say that they had found the website useful in a facebook group. I checked it out and, to my surprise, found that the website offers completely free promotion services to authors. They do have a selection process for books submitted, which is of course necessary. All they ask for in return is to share their website and I am doing just that. I don’t know if my book will be selected, but if it is then I’ll report back in a few days.
Anyhow, if you are an indie author, you definitely must check out Readfree.ly. It’s the only newsletter promotion website I have found so far which does not ask authors to pay.