Yogi...
Why are you coming into this forum to question what the man is doing? Don't you know this is a support forum? If you doubt or don't agree with the premise of the forum...Fine! But keep it to yourself or post on an opposing forum, don't bring the disdain here.
A sertvant of God offers his/her time in the way that God has guided them to and they respond obediently. That is called ministry and thousands of missionaries have offered their time, no, lives in the service of others. This appears to be one of the ministry fields for MTS. To prescribe limiting him to whatever little time "his pastor" will allow him is to say that he needs to be restrained. Why? Who are you or anyone else to say how he must work out his ministry?
If his ministry grows or doesn't grow is probably the least of his concerns, since anyone who knows anything about the Bible or the Holy Spirit knows that it is He that produces and causes growth. Whether the ministry grows into the thousands of followers or only reaches a few, it is the Holy Spirit who leads, and as long as MTS has been obedient to what God has called him to do, it doesn't matter a hill of beans. Thank God for that obedience and may the Lord continue to grow him and protect him from all onslaughts of the enemy in any form.
Perhaps you find God's love and ways difficult to believe?