Long before your target audience has completely absorbed your key messages, you are so sick of them you just have to freshen them up. Right?
Your target needs to hear the same message 8-13 times before it even registers with them.
How high do you let messages stack up before you get distracted/bored and change things up?
How close were you to the magic 8-13 times and maybe your first sale when you changed gears? When in doubt….leave it alone.