Hey Rob, thanks for replying. I'm sure you're right that email lists are more valuable although I was wondering more about the difference in half-life rather th

Hey Rob, thanks for replying. I'm sure you're right that email lists are more valuable although I was wondering more about the difference in half-life rather than response rate. I guess it's obvious that tweets quickly pass by leading to a short half-life. I'm still slightly confused why people would clickthrough from an email days (weeks?) after it was sent. Are they storing the emails to think about it and return later? I suppose the reason doesn't matter, it was just idle curiosity. Also, I've learnt a very valuable lesson about HN. I submitted this article when I read it before lunch Irish time. Unfortunately, most of the U.S. and the HN audience hadn't woken up so the link fell off the radar. Sorry for inadvertently burying a very interesting article. Keep them coming (and the great Startups for the Rest of us podcast)