CXL ran an interesting experiment that (1) added more specificity on a newsletter subscription page as well as (2) reinforced it consistently. Most visibly, an abstract or vague headline statement (control) was changed to a benefit oriented one - hinting that subscribers will eventually receive valuable case studies. This message was further reinforced with supporting copy that explained where these case studies are obtained from along with the frequency of the delivery. This same message was also reinforced with an image of actual case studies. The call to action button was also adjusted to mimic the benefit.

Impact on newsletter signups was measured.