For many this seems like an absurd concept, pay to work? But when you examine the concept it becomes clear why it is necessary. For those simply interested in the travel instead of paying out massive amount of money monies set by the travel industry for tourist seasons, you'd be paying much less, for a much, much more authentic experience. The work would be to your own interests and it would make a difference where difference is badly needed. So its good work, at worst, and at best not work at all but an approach to satisfaction. The understanding that one would arrive at about a particular country and by extension other countries like it (our under-developed brethren of the world), by actually staying there and working with its communities it is the best kind of education one can afford from traveling. If that is your main motto, do please get on board.