At my chapter less than 1 new disciple per year that stayed in UBF has been produced per married couple on average. On the other hand a human female is capable of producing almost one child per year from 18 to 30. Fishing can not be justified as a substitute for multiplying if UBF is truly serious about maximizing the number of disciples produced. Discipleship ministry is a farce.
Fishing plus multiplying could be justified but in a conference I overheard one of the people give testimony that their Bible teacher ordered them not to have any more children so they can focus more on raising bible students, if their rates were anything like my chapter was that was a complete farce. I am not spreading unsubstantiated rumors without eye witnesses hundreds of people or more heard the testimony at the conference. The word multiply means breed not fish.