This is a Christian ministry dedicated to sharing the gospel and equipping others to do the same. In 2012 they were at over 30 events and had 45 days of evangelism. 86 volunteers from 13 churches were involved. They share the gospel Biblically using the law to show people they are sinners in need of someone to save them from the just punishment they have earned. Then showing how the grace of God is available to everyone who repents and trusts the promises of Jesus Christ.
Everyone is a volunteer. No one in this ministry is paid. I'd guess less than 1% goes to overhead. They are very focused on using all possible resources to bring the good news to as many people as possible.
They changed their name in 2010 to better reflect what they do, but they kept the same MTA acronym - MAT. The new name is Move To Assurance