Sorry to come here too late.
Other comments chasson made on the French forum:
One possibility is that the WT mis-represents its African actions as development projects in order to take advantage of UN preferential prices (notably on vehicles) or to help financing constructions, travel expenses of COs or missionaries, and so on.
A list of IAPSO "customers" could only be found for 2003. The question of involvement before and after that date remains open.