You state this with certainty I haven't seen from the researchers in this area. I was under the impression that this more an open question.

it was never clear that FOSTA / SESTA was the solution. Law enforcement came out against the law because the law makes their job harder. Before Craigslist and Backpage cooperated with them in turning over data and traffickers. Now the traffickers are using other methods or working with less LEO friendly operators.

In particular a layer two solution such as the lightning network appears necessary to reduce transaction costs and delays.

As a moderator of multiple NSFW subreddits a factor not accounted for in this article is spam. The subreddits I moderate do most permit content from commercial (eg OnlyFans) accounts. These types if accounts constitute the bulk of our removals.

Being sex positive doesn't mean you need to let your community become overrun with commercial solicitation. In communities without OF rules, you see the some content spammed across dozens of subreddits. There is no engagement with the community. If this behavior is left unchecked it leads to the erosion and eventual death of the community.