When they first allowed DH deviation you did not get paid for the DH leg if you deviated. You also lost additional pay with the duty and trip rigs. Western had a somewhat infamous pilot named Arle. Western paid for deviated legs. Post merger he flew a popular trip LAX-HNL-SAN deadhead back to LAX trip. In SAN he called crew scheduling and said, “This is Arle on rotation XXXX, I am sick! DH a reserve pilot down to SAN to DH home for me. I am going to wait and watch!” The policy changed shortly after.