Thanks for the reply! Was only asking as with regards to CPM+CPC the major issue for everyone is fraud (to a much greater extend than CPA).

We tried other outlets for serving adverts, but with all of them trust was a huge issue for us which ultimately prevented us moving from Adwords.

Good luck with your business, looks interesting! And if you do move to CPC/CPM I hope you manage to solve the trust issue which so many competitors of yours seem to suffer.