At times there is also a large popup nag to sign up for the newsletter or something like that on the site (I was already signed up because I like the content btw)
I really like what Andrew does and I feel like these kinds of aggressive moves might have some negative effects on the brand.
Meetup.com does similar annoying things with a nag screen to tweet about a meetup you singed up for or are attenting and there are no profile settings to make them go away so they come back whenever you switch browsers or reset safari etc.
Anyway, know your audience and stay classy please.