Mine own profit (to emoutou sumpheron). Old word from sumpherō, to bear together, and explains use of verb in 1Co 10:23.
That they may be saved (hina sōthōsin). First aorist passive subjunctive of sōzō, to save, with hina purpose clause with same high motive as in 1Co 9:22. This is the ruling passion of Paul in his dealings with men.