This type of problem falls on what I call the "conversion" problem. Having a customer where I did some work with e-mail campaigns with several products and dif

This type of problem falls on what I call the "conversion" problem. Having a customer where I did some work with e-mail campaigns with several products and different populations, it was almost constant for these values: 10-15% open the e-mail. 1-3% Convert or create an action. And I do extrapolate these numbers for the whole population. It come to be the 1-3% that "do something" and that 10-15% who reads and leave for later. Parents and teaching meeting? 10-15% will think about going...1-3% will go and take some action (volunteer, raise). Same on other activities. I am not blaming or judging, but we can't always be on 1-3% every time all the time. So expect 1-2% of visitors giving stars for you.