I can tell you about one thing that I didn't find mentioned. Argentina's Naval Prefecture is using a product called Galatea Watcher from Ascentio Technologies (they are the main contractor for Argentina's Space Agency and have developed the ground segment and done operations for them). This product does pretty much the same as in the article: it takes satellite imagery from several sources, does image processing and detection on them and cross-references it with AIS reports from vessels and alerts all the suspicious activity. One could see all the ships getting positioned just in the international border and then disappear by night. This is a well known issue.

Disclaimer: I used to work for Ascentio.