i would normally agree until i did some classy ones a few years ago for my last business. it was simple, well designed and just cycled through some readership stats for the media co i worked for. handy sales tool and the reps got some great feedback. might have to cram it all on the ones page - bugger
I do understand the appeal of trying to get a lot of salient information in a small space, believe me. But if you're designing an email template then the focus of the design is on *the content of the email*. That is the purpose of the communication. Anything else is ancillary. And anything that flashes or moves or changes, however well-intentioned, is distracting from the key information, reducing clarity and comprehension. And for that reason alone, as a designer my instinct would be to kick that shit square in the nuts.