I've used them for 6 years now. I typically pay $20 for a month leading up to release and then cancel the plan until the next release. I do think it's worth it since you can vet readers there as well.

I always get very poor feedback from BookSirens readers. I use BookSprout but you can also check out gayromancereviews.com
However, the number if reviewers there dropped significantly since my first MM release two years ago.

After 2 years of dialysis I'm only now finding out (thanks to a kind lady in the city office) that I was qualified for discounted electrical city program because I have a life support machine at home. No one told me 2 years ago and no one is going to backdate my 24 months worth discount

because you are not patient or professional enough to wait for a person to explain why she is asking for a refund…is not professional and in bad taste.

The sales person was way friendlier.

Of course, social media and newsletters are somewhat different in how they present info and which info. I wouldn't be microblogging using my newsletter. I'll lose all my subscribers. But I noticed NL has been very effective in terms of sending click-links to readers. I always make sales using it.

It’s so much better than half the stuff occupying Top 10 on the platform.
The only downside: should have included the Tina Turner moment too. 🤘🏻

Awkward introvert author trying to market books:
Hi. I made this. Buy it. I promise it's good. I cried when I wrote it.