Her masters; for she was a servant, or slave; and being very advantageous, might have many that had a share in her. Their gains; the profit could not but be considerable, for they were to come with the rewards of divination in their hands, as they did to Balaam, Numbers 22:7. Rulers: See Poole on "Matthew 16:20".
Related Commentaries of Acts 16:19
Acts 16:19
19 And when her masters saw that the hope of their gains was gone, they caught Paul and Silas, and drew them into the marketplaced unto the rulers,