Today I found the below study from Nextgov. It would seem that the concerns so many were expressing about abuse, misuse and rapid growth of OTAs may be premature. Over the last ten years, ten billion dollars were spent using this authority. The study shows that TSA is the biggest user of OTA, not DOD. Of course there is no guarantee that this won’t change in the future, but looking back, it seems that its use is relatively minimal considering overall government spending during the same time period.