Congregations seeking to transform are less concerned about people becoming members. They are more concerned about having different connecting points with people. How people are connected with a congregation speaks to activity. It is about doing. Having people as members of a congregation speaks to their relationship. It is about being.
While both are important, there is something about being that speaks to a person being in neutral or having completion. There is something about doing that speaks to activity, progress, even disciplemaking.
Would your congregation rather have people as members to show growth, or connected to show kingdom progress?