We can notice in contemporary usage that the speakers often replace ba with the preposition pou (from French pour):
• I matjé an let pou Joj.
A hint on the ongoing reinterpretation of ba as a preposition consists in the possibility of focusing it together with the noun/beneficiary: Ba Ijenn Ijénie ka pòté mango; this focalization is excluded by serial verb constructions.
Source: Bernabé 1983, vol. 3
Source: Ludwig 1996: 282ff.