According to the link provided, land includes minerals as well. I’m also thinking of the water issue in Ariz where SA is renting/owns property and is growing cattle feed crops to export back to SA and is using tons of ground water to do it. The ground water usage is the issue, exporting back to SA is the icing on top. SA was using shell companies to hide true ownership.
Any foreign land ownership is a possible problem, no matter who owns it friendly nation or not. I just wish there was a better definition of bona fide resident. Pretty holely if you ask me. Most likely this is a taxation related issue under the surface.