Can someone explain what is the reason to be mined so much empty blocks, is it somehow related with shares?
There is no reason. The Dev now regret his mistake. It is a fair relaunch that hurts. Should've put it from 1 - 120 (0 reward)
and then 121 - .... (reward). Yes!
No regrets here. Remember that there is a coin swap taking place at Bittrex & Poloniex.
We gave the exchanges ample time to successfully perform the swap for the community. They are responsible for many other business related duties and extra time was given in consideration. The Last thing we wanted was for the new XHC block rewards to get mixed up during the swap.