The submitted article is talking about a reaction to the behaviour of one publication who were openly allowing people to advertise kidnapped drugged children for sex; and then when they took a minimal step back from that the publisher was giving advice to advertisers about how to create an ad to sell drugged kidnapped children for sex without hitting the publications new filters.
Once these children were rescued they were telling the publisher that some of these ads contained images of them; that they had been kidnapped, drugged, and repeatedly raped; and that they'd like the images taken down and preferably for the ads to be taken down. That publisher refused.
One of the problems of decriminalisation of buying and selling sex work is that someone who wants to fuck a 14 year old child isn't going to use the service a 25 year old provides, so legalisation has limited usefulness to prevent the kidnap and drugging of children.