[philipodonnell]

That's why I put the word creative in there. If you ran the segmentation one way and ran some ads and then uploaded some data into Facebook and ran the same ads, you could infer what effect your added data had when combined with Facebook's data, possibly to the individual level if the person interacted with the ads/converted to a paying customer.

I don't have a specific use case because its not my industry, but Facebook's approach seems to be to give people tools they know can be misused in creative ways but then frown sternly if they get misused, so it wouldn't be out of character.