Open Rate

“Now to say that it kills newsletters is equally simplistic because clearly if you're selling your subscription and people are paying 10 dollars a month, then the open rate means is less important because the open rate will be 80 or 90% anyway. And if you're op…”

“So the Apple mail app will download all the images. And so it will report a hundred percent open rate for every email that you get. And so you won't know what the open rate is for 40% of your base.”