Anonymous ******************
@Helen *******
You're correct. People assume that immigration cannot retrieve information about application conditions and similar details, but they are wrong. The example you provided is proof of this. Random checks are conducted on all visa holders, with no exceptions, regardless of whether their visas are valid for one year or longer. Those who claim that no checks could or will be performed have absolutely no understanding of how the system works here.
The DTV is a new visa, and it may not be immediately subject to checks to market it effectively. However, the laws are already in place to control borders and ensure visa holders respect the purposes/conditions of their visas. Loopholes exist and these are getting closed with the time.