I think that one reason that families like the Duggars trend towards "recovery" programs like the Recovery Unanimous scam (and I do believe it to be a scam) is that they allow ongoing denial. One of the tenets of RU, according to their lit, is that any discussion of "past lifestyles" is "ungodly," and therefore forbidden (talking bad about the food is also forbidden and may require a period of fasting and prayer). Further, program participants are required to rat one another out for rule infractions or else receive the same punishment as the transgressor. There's no chance of anyone digging around in any past issues or finding any family secrets in such a system.
Looking at their literature, they only list two staff persons. Oddly, both are pictured with their wives in joined at the hip pictures, with their years of experience combined (as if a guy with five years experience actually has 10 years), and discussed as if the unrecognized wife is actually doing half of the work. Neither staff person has any credentials expected of a therapist, technician, or even ministry so far as I can tell.
It looks like the bulk of "treatment" comes from working through a serious of workbooks, journaling and memorizing the Bible. Oh, and working. That would be "community service," in the form of "volunteering" for the entity's "business partners." And this would be substantial--7:30 to 4:30 five days a week. And this is why I view this whole thing as a scam (as opposed to well-meaning but misguided folks who earnestly believe in their variation of prayer-therapy). Not quite sure of the size of this operation, but even if its only 10-15 inmates (er, clients), that would be 10-15 FTEs of free labor provided to some "business partners" in exchange for what, exactly? I think that there was a church in Akron that recently got busted for a similar scam--requiring church members "volunteer" to run a for-profit restaurant that kept the church running (and bought a luxury aircraft for the minister).
End of the day, addiction treatment according to commonly accepted practice has a fairly low long-term recovery rate (still, far better than nothing). I don't see anything associated with RU to indicate that anyone has any notion what their success rate is.