But, yes, part of the intent here is to enable us to achieve better ROC[1] in our models and to block more fraud while also encumbering fewer false positives. From our testing, it's very clear that these bot-detection techniques do substantially improve the accuracy when compared to other, coarser heuristics.
[1] https://en.wikipedia.org/wiki/Receiver_operating_characteris...
We use Sift as a backup, and that makes it easier at the same time it as really showing how poorly Radar does in some cases.
Truth be told, it is really good with heavy “dumb” carders, but not when it gets complex. Hope this gets addressed at some point.