You should get paid to skip the DH, especially if it's on another carrier and they can cancel (and not pay for) the booking. As for the percentage you get paid, while I agree it should be 100%, some regionals just aren't going to go for that out of spite. When I was at Comair, it started at 50% pay, then in 2001 went to 75% for a year, then to 100%.

You know what happens when DH pay goes to 100%? You find yourself doing FAR fewer scheduled DHs.

When we began giving concessions, we had to give on the DH pay. It went back to 75%. However--and you should take this to your MEC/Negotiating Committee--we were able to get the company to use 100% pay credit for building the schedules, so we could get better trips and a little more time off; the pay adjustment took place after the trip.