We clean the list monthly from subscribers that have neither clicked nor opened the email in the past 6 months. Daily opening rate is between 50% to 55%.

@John_Ollila:disqus You are for sure not segmenting your email list (something klavyio allows you to do at an advanced level).

You need to clean your lists by removing any email that has not engaged with your emails (opened and/or clicked) over a period of 180 days, otherwise you are wasting money.

I bet you have at least 50% of your email subsribers who never click on your emails (and would never click on your aff links)

We have looked several options over the years, but they tend to cost significantly more due to our monthly email volume of 1.6M to 2M.