Wondered about that too.

What also seems a little strange is that his blog has a members only section with special "deals" like book excerpts for which you need to sign up.

Never saw that on a personal blog, I might be mistaken, but on first glance it seems like its more of a business than just a personal blog.

Looks like it's blocking some script that changes .mainHolder's CSS opacity property value from 0 to 1.

I've had the same experience whenever I go to his page. It seems odd that a guy that needs no money from his website would have one that doesn't display on everything. There are few sites where my blockers block all of the content. This is one of them.

Similarly with Ghostery