Their pages advertise everything from fake documents to safe passage by land, air, or sea. Many are illustrated with photos of luxury cruise liners or crisp new passports, and include package deals - "Kids go free" is a popular offer - as well as glowing testimonies that purport to be from migrants who have made the journey.
But behind the glib promises and the slick online communications is a ruthless real-world web of smugglers and con men who thrive on the vulnerability of the migrants.
This web extends not only across the Mediterranean and the Middle East but deep into sub-Saharan Africa. Abdul Aziz alone claims to have agents in "almost every Arab state" and says "if people can't get here to Libya, I have legal and illegal ways to get them into the country."