As I said, it’s in the robust history of effective A/B testing/campaigns with measurable effects on revenue in this space.
Which history is...? (I now ask for the third time.)
I don’t understand what you’re asking apparently. Do you want se books you can read that take you through the history of direct response marketing?
Which history is...? (I now ask for the third time.)
I don’t understand what you’re asking apparently. Do you want se books you can read that take you through the history of direct response marketing?