Every church outside the founding cohort joins as an Outpost: a straightforward vendor relationship, at a rate the scale of the cohort helps hold down.
Outposts pay less than the market asks. The volume the larger cohort churches bring is what makes a lower rate possible for smaller congregations.
No stripped-down tier. Round-ups work exactly as they do for the cohort, with the same payouts and the same records.
A straightforward vendor relationship. Nothing to sign beyond the service itself, and nothing that ties you in.
Denominations and associations can bring their member churches on together rather than one at a time.