I'm inactive today; that does not mean I will remain inactive forever. If the board in question was lacking moderators to handle the board, then the admin could have appointed others, but in this case there are still two who are very active, just as you have noted.
How about MiningBuddy that has been inactive since 2018?
But I do not like when someone just come to ask this question when he has no good reason to ask such question. All post that I am reporting in all the boards are handled fast and that is how it would be for other people that are reporting posts to moderators.
So why the complaint?