The existence of international trading networks of CSAM material speaks otherwise to this, as well as the frequency with which participants in trading but not active producers are usually an ingress point into compromising them.

Even if the currency is barter - i.e. "more unique content" - that means the incentive is for people operating unchecked to feed their thirst for it have a market for the creation of it. Temporarily cornering the market with new content no one's seen before means you can trade for huge amounts of other content successfully.

After all, everyone involved is taking a huge risk by even being a participant.