We talked about that
in this thread no so long ago.
I refuse to delete from my sub list people I enjoy (or enjoyed) watching.
Sometimes they take a break, sometimes they disappear for a while, sometimes they die, vlogging gets old for them, they grow up, start a family, they don't have enough time to vlog...
There are lots of things happening to vloggers, that doesn't mean, in most cases, that they have given up.
Sometimes they get forgotten then you jump out of your seat when they upload something after so long...
Also, you are giving a very short timeframe. Take my channel for example. I upload one vlog every 4 or 6 months. For external reasons, I just can't do better. That doesn't mean I gave up or stopped vlogging. I just can't publish my material on time.
I miss one vlogger that fueled up a few of my vlogs when I went out to ride silently with no ideas. I'm his sub number 6000. I just hope he's still riding at least.