Facebook has introduced the "action_source" parameter into Conversions API, which for most use cases will be "website" for the value. Are we able to optimize toward conversions we send in this manner for values other than "website"?
For example, let's say that we currently drive people toward a page where we collect their information and then call them over the phone to finalize the order. We could send that final order as a conversions API purchase event with action_source="phone_call" and we'd like to optimize our ads toward the finalized order if possible.