When you put together your email campaigns do you ensure that your call to action link, at least one of them, is above the fold? Email acts just like any other web page and any digital marketer knows that the real estate above the fold is far more valuable because so few users do any scrolling.
When crafting your email campaigns remember that mobile devices will show far less content above the fold. Since over 70% of your subscribers see your email on their mobile device only or at least first it is also imperative that you include that you consider what will be required to get your call to action above the fold of a mobile device.