Does this answer that question?
New subsection 213(1.1) targets communications for the purpose of selling sexual services in physical (or “real world”) public places, such as the street. Nonetheless, the offence could capture communications between two or more persons that take place in virtual locations that are publicly accessible, such as on social networking sites like Facebook, if two people communicate with each other for the purposes of exchanging sexual services for consideration on such a site and it is determined that children could reasonably be expected to view that communication.
However, subsection 213(1.1) would not criminalize advertisements for the sale of sexual services because such advertisements do not involve direct communication between two people for the proscribed purpose. The proposed advertising offence (section 286.4), on the other hand, targets advertisements for the sale of sexual services.
http://www.justice.gc.ca/eng/rp-pr/other-autre/protect/protect.pdf