On the one hand, HETACHAIN properly closed the ICO on December 10, on the other - a bit early. Of course, if they received additional funding from private investors, then everything looks quite justified.
The private sale had ended before and I don't think any money has added by private sale investors. They closed the sale because the soft cap had been already reached and almost no more money was being invested in the ICO. So, they decided to close the ICO and focus on the project.