We can notice the sharp increase in the number of votes in May 2023. This explains the increase in the number of posts and comments, especially comments. At this point probably some of the comments started to receive votes from the official account. The number of votes increased from 60 per day to 150 per day. It has decreased a bit in the last period but there is still more than 100 votes casted per day from the official account.

they probably started voting on some of the comment and this made the comment go up too