I'm not even sure if these examples are that effective. What makes them effective? If the measure of success is whether or not one actually reads the copy, then

I'm not even sure if these examples are that effective. What makes them effective? If the measure of success is whether or not one actually reads the copy, then for me the best approach is to right it like a personal message. In that case the success of email copy is predicated on deceiving the recipient...?