Hey,
I inserd your code in the additional template for the correct style.
Code:
// hide post counts in all the threads for Ank?ndigungen forum
.page249 .b-userinfo_additional-info-block .b-userinfo_additional-info:nth-child(2) {
display: none;
}
But something is wrong. Because nothing seemed to have changed (post in the thread Ank?ndigungen).

It counts - post count:43 and the next 44.
But my intention is, that these counter counts only entries of the "important" channels. The counter should remain unchanged when somebody posts an entry in the channels which are set to be not counted.