As you don't provide a predefined metric to request "Conv. value / cost" in the Reporting API, we're calculating it ourselves by doing `Total Conv. Value / cost`.
We've been using this calculation for a while, however, since recently we are noticing some discrepancies with the interface in some cases. Checking the definition again, we found that it now includes the following:
The cost in this metric excludes interactions that can’t lead to conversions, such as those that happen when you aren’t using conversion tracking.
Is there anyway we can fetch that cost, so excluding the interactions that can't lead to conversions, so we can calculate a correct "Conv. value / cost"?
And if not, are there by any chance plans to add "Conv. value / cost" and "Conv. value / click" to the API?
Thanks,
Tiana