Thanks for reading my article, but Missing 411 isn't just a U.S.-based phenomenon. For starters, David Paulides's organization is called the CANAM Missing Project, implying clearly that from the start, cases from Canada were also involved.
In his later books, Paulides then reported on cases from Australia, the U.K., and other European countries. In his videos, he often mentions that the probable reason why his cases are limited to mostly English speaking countries is a language barrier limiting his ability to do research in most of the rest of the world.
Some of the most bizarre cases that possibly or definitely fit the Missing 411 criteria were identified by other researches in yet other areas of the world like Indonesia or Russia, including for example the (in)famous Dyatlov Pass incident.
It is indeed also very possible that different countries are differently good (or public) at tracking missing person cases. Before David started his work, many of the American and Canadian cases were all but forgotten, and they certainly weren’t tracked properly in any public database.
It's not hard to imagine that the missing person situation is much worse for example in the Eastern Europe, not to mention most of Africa or certain parts of Asia, and even less properly tracked.
As for UFO encounter tracking, the U.S. with their MUFON organization is definitely much better at it than even the rest of the developed world, but that also doesn't mean that there are no UFO encounters anywhere else, or that they’re any less frequent outside of the U.S.
If there are technologically advanced aliens flying around this planet and picking up people to study them, then, in my opinion, there isn't much difference from the alien point of view between the least and the most sophisticated human, since all of humanity would be far less sophisticated than the aliens.
If aliens are abducting people for whatever scientific or industrial purpose, the most interesting should be individuals that differ from most people, the absolute outliers in intelligence or physical fitness. Which seems to be corroborated in Dave's data by the fact that both the most and the least intelligent and fit, as well as the youngest and the oldest, are much more often involved in a Missing 411-type case than average adults.