I tried sending marketing emails because it seemed the done thing. But it made literally zero difference to my business and probably made me seem a tit to others so I stopped.
Discussion
I guess it depends on what your business is to some extent. But yeah, I personally am not a fan even though I think it's the less invasive type of marketing.
Yeah, it depends very much on the nature of the business and the clientele. I can't pretend I really understand how it all works - seems to come down to trial and error.