Too Long; Didn't Read
When it comes down to A/B testing, it is important to have different hypotheses behind each test. The objective of A/B testing is not only about having better open rates or click-throughs or conversions this time round, but it is part of a never ending process to understand your audience better. It is not about throwing random things to see what sticks, but about testing the assumptions you have about your subscribers. A/B testing can let you know what works better in comparison but the possible elements you are creating to test still come from your marketing instincts and strategies.