My parish, Good Shepherd, Sioux Falls, is a known Biblical orthodox presence. We have folks coming from towns an hour away, and even a few from out of state (we are near the Iowa, Minnesota and Nebraska lines) because Biblical Anglicanism is hard to find around here. We get frequent visitors from out of state who pass through Sioux Falls on business, and find us on the internet for Anglican worship. Parish members were instrumental in forming the American Anglican Council/South Dakota chapter. (The CCP map only lists parishes - there are a number of active Anglican groups that don't show up on the map because of this).
But, the vestry has been unwilling to align the parish with any orthodox entity, even when it was still possible to do so and stay within TEC. Some of their decision was just plain fear of reprisal. Although it is not clear to me what the diocese, under current Canon law, can do to a parish church, the common belief around the diocese is that "something will happen." (And this belief is shared by moderate and even revisionist clergy I meet. The church here is ...uh... unusual).
In North Dakota, faithful Bishop Michael Smith, who is standing strong despite attacks, isn't counted as Common Cause because the diocese is not aligned with any entity other than TEC.
It is a sad time in North American Anglicanism. The failure of the Episcopal Church to engage The Dar es Salaam Communique or any other substantial plan to respect Biblically orthodox witness means that those who stay in TEC will not be recognized by orthodox groupings, and that those who seek orthodox affiliation will be punished by TEC.