There are two things that is exploding:
1) Hacked accounts and thus scams and all kinds of shady activity.
2) Shitposters from various 3rd world countries.
Other than that, the forum is degenerating and is worse than most mainstream news outlets and their comment sections. The numbers that you've pointed out are actually bad.
There are a lot of newbie accounts but do we not give some of them the benefit of the doubt? Bitcoin is hitting mainstream news because of the ATHs so new people will migrate here. Obviously you can spot the shill / shit posters from a mile off but I think there will, genuinely be a lot of new people here now.