A church could be both denominational and distinctive, though I believe that the distinctiveness probably will overshadow the denominational connection. One of these social positions has typified growing churches. In the last two decades, it has been the Distinctive churches which have tended to grow. While statistics support the comparison, the analysis needs to be questioned. Theology may not be the most important factor.
Population changes are part of the answer.
Churches in dominant and denominational positions are vulnerable to the supply of persons suited to the label. If no Presbyterians are moving into our town, then the Presbyterian church will likely be declining. The movement of people is one ingredient. Societal changes are also part of the answer. I am inclined to think that the biggest factor is something much simpler.