Source? This Reason article says differently:

"Operation Pacifier is reminiscent of reverse drug stings in which cops pose as dealers to catch retail buyers, except that in this case the FBI actually disseminated contraband. It did not merely pose as a distributor of child pornography; it was a distributor of child pornography. During the two weeks the FBI was running The Playpen, about 100,000 people visited the site, accessing at least 48,000 photos, 200 videos, and 13,000 links. In fact, the FBI seems to have made The Playpen a lot more popular by making it faster and more accessible."

http://reason.com/blog/2016/08/31/the-fbi-distributes-child-...