Because there are dozens, literally dozens!, of creative women out there who want to work in comics. We only come in packs of 12 and must rotate out every few years or so, lest there become too many of us.
This is pretty much Mad Men in a nutshell.
I don’t have A Dance with Dragons yet. I don’t own an e-reader and must wait until Friday (payday) to have the dosh to pay for a hardback. So I may be avoiding the Internets/twitters until then.