What are you doing to keep those 30.000 a day engaged and remember you?
What are you doing to make those 30.000 a day link for you?
What are you doing to have those 30.000 talk about you?
You say you get plenty of natural links already, so if it was my site I would focus on making those natural links come faster and in more numbers, how about trying to make a strategy around that instead of simply building links yourself?
and as others said before, give it 3 months at least...