Actually, they took in orphans, back in the day, and at a certain age, probably 18, the orphan could leave without a problem.
Probably come back, too, within a reasonable amount of time.
At some point, the communities made the decision not to take in or accept any more members.
A quick lookup says that there may be two of them left.
At the opposite end, in the mid-1800s, there was a sex commune in Oneida, NY. Eventually, the members realized that they’d have to make a living some how, so they turned to making silverware.
Any way, the commune booted out one of its more aggressive members, who, in a fit of pique, after a string of various failures, directed his anger, and gun, at then-POTUS, James Garfield...
Interesting! Certainly have heard of Oneida silverware! Thanks.