Hi Shane,
We hear you and have this prioritized. It is a very tough one to work on cause we need full access to both our Discourse logs and Google logs.
@MarkDoerr has a relationship now and access to one of our customers that has this configured, we are investigating where it takes us. It could take weeks or even months to work out.
We will certainly update here as we come up with various findings. We want ads to work great on the Discourse platform, but need to know exactly what needs improving.