From the article: "The ferry flying industry is a close-knit band of aviators, some of whom have carried out hundreds and even thousands of flights, delivering newly sold or repaired small planes to remote destinations."
In my travelling days, we use to refer to these people as sky jockeys, who use to fly any type of aircraft from the small Cessna to the very much larger aircraft that was more suitable for commercial aviation in more remoter areas. Death from these sort of missions often went unreported for various reasons, and yes it is true that this band of people are usually very close knit, due to their previous aviation experiences, usually via military service.
At one time South America was a great staging post for 'redundant' aircraft, that were ferried, usually from the States, having seen most of their commercial life out there, with their final destinations, who knows where. Places like the Tequendama in Bogata, was usually a resting point, and any aviators or 'sky jockeys' in town, soon made their presence known. I suppose it all came with the territory, one day you are here, the next day, you are not sure. Do the job, get paid, then start all over again. There always seemed to be plenty of work available?.