Channel's shadow banned from posting too much low quality content, and he's just gotten boring. All the funny things come in tiny clips from his lives, and those are few and far between. You can watch a whole years worth of funny content in 10-15 minutes now.
I don't think it's a shadow ban. There aren't enough likes and comments on his videos to get it recommended. Even if you were subscribed to his videos, the algorithm isn't getting the signal from the viewers that they're good and most videos will only have 800 views after two weeks.
I also think that of the 100K subscribers, most are subscribed to similar content on dozens of other channels. basically, the market is saturated for this kind of content.
I would guess that few Getbiggers are subscribed to his channel and even fewer watch it on a regular basis.