Very often, and for many different reasons, God will shrink a church from one size down to something much smaller. Sometimes the reason a church shrinks is because they have made some poor choices, but often the reasons are totally unavoidable. Changes in employment, changes in the community, changes in denominational affiliation, or a new church opening up down the street are common causes of church reduction. It is very common to find a church that has shifted from 1000 members to 500, or 300 down to 100, or from 100 down to 20. When that occurs, changes are necessary!
God has a great track record of using the smaller, weaker things of the world to accomplish His will. He gets more of the glory that way. The litmus test for how much a church can accomplish for God isn’t the size of the church, but the willingness to allow Him to work through them. God uses churches of all shapes and sizes.