Don't need to see a picture or know whether OP has suffered permanent damage. He settled his claim for 10,000 miles and this is over and done.

This is why settling these things too quickly is a bad idea. What if it had become infected and he had his leg amputated? Still worth 10,000 miles?

The DL risk management people are not dumb. They almost certainly had an incident report to review and knew that if they could get rid of this for a couple of SM, it was a win.