Current bids are around $0.005 CPC - so 200 if you go with that bid.
Yes, GEO targeting will yield fewer impressions, at least for now that we have a very limited publishers base due to us being in beta.
Traffic is coming from a few faucet publishers who is helping us with the final stage of the beta test.
No, we have a new advertising network in beta. The interstitial format will be one of our formats along with banners and video.
As I previously said, the traffic does convert http://prntscr.com/h6lm65