DK... Maybe I'm in left field, but isn't 7 million just a drop in the pond when looking at the big picture here?
I see a lot of posts saying that "targetted email marketing" is not only still effective, but still very profitable, and will continue to be so.  I have my doubts.
But I don't want to confuse mailing to opted in's versus mailing to 
members of a specific service.  For example, when I send out the xnations newsletter twice a month, I am not selling anything.  I am simply passing on information about a service to which the addressee uses.  There is a big difference.