Direct mail more effective than email

Shawn Collins believes 

"The email is excessive and essentially useless. I don’t open 90% of affiliate program and network solicitations in email based solely on the subjects. And that’s if they make it past my Spam filter.

But when I get snail mail, I’m good for a 100% open rate. That was the case when I got the following email from the Epicenter Network.

Versus their more appealing direct mailer: