If the group is really organized on a purely secular basis, though, it would be the first counter-example to the historical dictum that small scale communism only works when it has a religious basis and provides goods or services to the society at large. (Endowed monasteries don't count since they aren't really a means of organizing economic activity even when viewed in purely economic terms. Self-supporting monasteries, the Oneida and Amana communities being the notable examples of successful small-scale communism.)
Note: small scale communism is actually simply an alternate means of holding private property, in which the ownership is voluntarily shared on a basis other than the investment of capital in an enterprise, and thus should not be obnovious to conservatives. Communism becomes the evil we remember from the Soviet Union and recognize in a few hold out regimes and in dilute form in American liberalism when the coercive power of the state enforces common holding of property.
30 years is a pretty good run for any commune. Eventually all communes turn to commercialism if they are to survive. Do you wonder if this one is actually purely secular?
You left off the earliest such American group---the Shakers.