It's probably either waiting for approval to sell ads or was denied and they're adding more stuff. Google has a virtual monopoly on ads, and their approval process can take 1-2 weeks. Google's content policy basially demands that your site by full of generated trash to sell ads. I did a case study here, in which Google denied my popular and useful website for ads until I filled it with the lowest-quality generated trash imaginable. That might help clarify what's up.