CFR Title 28 § 75.1 Definitions.

(c)(4) Producer does not include persons whose activities relating to the visual depiction of actual or simulated sexually explicit conduct are limited to the following:

(vi) Unless the activity or activities are described in section 2257(h)(2)(A), the dissemination of a depiction without having created it or altered its content.

TITLE 18 > PART I > CHAPTER 110 > § 2257

§ 2257. Record keeping requirements

(a) Whoever produces any book, magazine, periodical, film, videotape, digital image, digitally- or computer-manipulated image of an actual human being, picture, or other matter which?

(iii) inserting on a computer site or service a digital image of, or otherwise managing the sexually explicit content,[1] of a computer site or service that contains a visual depiction of, sexually explicit conduct; and

Secondary Producers are "inserters?" As compared to what -- wankers?
So far there has never been a case at trial setting any precedent. So, any legal opinion is based on?

Not legal advice offered in background discussion only.