It's basic economics to be honest. In case you hadn't noticed,...

It's basic economics to be honest. In case you hadn't noticed, TIE is competing with a very large number of junior miners for limited investment funds. One of the only ways to attract attention is to put out announcements or presentation pack.

In this particular case, if the result is considered material the they have to announce, so it's really just a decision around the frequency rather than a choice to announce or not.

I think your point about the underground result is most likely wrong as proving an underground resource is a positive step forward.