I think each user here naming sites worth advertising ourselves to is semi-pointless.
How about everyone who reads this, all of us active users who care about the future of writers SE, just take it upon ourselves to go try and persuade whoever we can to link to us, to mention us, to join us. Go on an hour-long evangelizing trip on the internet, and that should do it. Maybe do it twice if you're really feeling motivated. And then in person (because we do exist beyond our computers and internet connection, right?) mention the site to other writers. Maybe even put up a pretty poster somewhere if you live near a humanities-oriented university!
If even ten of us did that, it might make a serious difference. And of course we'll notice immediately if our efforts pay off.
Because let's face it, we've got 1.3 questions/day right now and that's a death stamp, and I'd miss this site. So let's all make an effort!
On an unrelated note, I have a slightly morbid question which a mod might fork off into a new question: does this site have the potential to work in the first place? Writing isn't like programming. There are not one hundred million facets and details with specific, correct answers, nor is it a field where new techniques, devices, and systems are introduced on a daily basis. Writing is writing, and it's been largely the same for thousands of years. Sooner or later, we will truly have answered all possible questions. Almost everything will become a very close duplicate of a previous question, or an immediate variant. I feel I'm going to get some strongly disagreeing comments, and I understand because I know it sounds like I'm putting down the art of writing, but I'm not -- I'm just saying the field has very little potential for questions to be any different in 5, 10, 20 years than they are today, unlike the technical fields. Our field is very, very slow to change and grow. This can't go on forever.
I do realize the industry changes quickly, particularly in the last 10 years, and probably more so in the future. But that isn't enough. So maybe we'll have new questions of the form "How can I get myself into household-hologram characterization?", but that only provides ground for a limited number of new questions before we've talked it through in its entirety, and can just point someone to a pre-existing question. Industry changes are not sufficient, in my opinion.