E-mail multivariate testing á la Nir Eyal: Send 4 versions of the e-mail with different subject lines, to all recipients. Count how many people complain. The number of people who complain are actual human subscribers. Repeat X times until people stop complaining. Solve for X. 🧐
On twitter.com ♻️ 1 Retweets❤️ 4 Favorites2018 Mar 14Mood -6 🙁