Great links, thank you! The article centered on this report, "Orphanage Entrepreneurs: The Trafficking of Haiti’s Invisible Children" (The findings are what I thought is relevant support to what should be self evident: the explosion of NGOs is profitable, and the profit drives some people to create the demand for donations, i.e. selling orphans who aren't really orphans at all).

An estimated 32,000 children live in orphanages in Haiti. More than 80% are not orphans.

and this:

Next Generation Nepal (NGN), who work to reconnect trafficked children in Nepal with their parents, found a direct link between orphanage trafficking, institutionalisation, and voluntourism.

New evidence suggests many children in orphanages globally are taken from their families by recruiters and sold to orphanages for the purpose of profit.

In May 2014, 600 children rescued from two Indian railway stations were allegedly being trafficked from their homes in Bihar and Jharkhand to an orphanage in Kerala. 43 people were arrested and charged with child trafficking offences.

Children living in residential institutions are more likely to go missing than children in families. There is a significant relationship between missing children and trafficking, meaning that children missing from institutions are at serious risk of trafficking and exploitation.

The pdf link in the article didn't work for me...I finally found the report and archived it. http://archive.is/7a1rS