Let’s take it from the beginning then.
A way to naturally limit your followers already exists. It’s called thrall pot.
But it doesn’t work years now. There’s nothing more natural to die from starvation
.
Then again you seek for a perfect mechanism to work when the standard existed don’t. Didn’t you listen? Your thralls cannot protect your base from raids years now.
I do understand where you are getting it, but i don’t see it coming, yet like i said above i like your creativity. Don’t stand down, keep it coming.
Ps. Maybe there’s not a natural way to limit your followers, but a cap exists already
.