Because that for his name's sake— "For the sake of spreading the name or religion of Jesus:" out of zeal for his honour and interest, they went out, abandoned their habitations, possessions, and callings, that they might spread his gospel; receiving nothing of the Gentiles among whom they laboured, that they might take off all suspicion of those mercenary views, above which divine grace had so far raised them.
Related Commentaries of 3 John 1:7
3 John 1:7
7 Because that for his name's sake they went forth, taking nothing of the Gentiles.