Congrats on the 1000!
Just to clarify what I mentioned above. I don't mean you should promote more than one sponsor on a site. If you can submit two a day, I'd advise submitting them to different niches, and using two different sponsors. ie one mature site using flash cash, one teen site using silvercash. You maximise your chances this way.
And yes, invest in some content when you can. Don't be scared of tgp either. There are ways to make it work. Hit me up when you decide to take the plunge.
