MST holders means monthly season ticket holders. More 4000-5000 people in Bobbili , VZM to VSKP do daily travel to their offices and come back to home in evening.
Teachers, Students of Engg, Polytechnic colleges of VZM, Railway employs and some other vendors depends on this train to come back to their home in evening. Specially people travels to SCM, KTV, PDT.
Morning VSKP-Koraput passenger , now Samata also good option in morning for MST people as timings changed.
Only...
more... problem is special ticket checking at VZM and between VZM-SCMN is a regular task. They wont allow MST people to board Samata , Visakha exp and other exp trains. So this passenger is life line for them.