As part of our AppSumo sequence to get "Select" partners on our site, this email is a well-performing part of our approach. Notice how it's short-and-sweet — the shorter the email is, the easier it is for a busy person to read. We also used social proof in this email to make it more compelling. One of the first questions a recipient of a cold email will think on receipt is, "who the heck are these people?" By providing social proof, we help stand out immediately as more trustworthy.