There are several reasons for low open rates, every marketer is facing that problem.
My list has been getting less responsive in the past few months, I have been noticing a lot less open and clicks. I'm not sure it's just what I am doing or the medium has run its course.
I mail twice a week with information (just value, not selling anything at all) and normally do an affiliate promo once a week (if I find a good product or service).
What are the suggestions to overcome this?