Received an $800 voucher for giving up a paid FC seat on an overbooked 7:10AM IAH-ATL (DL810) flight on June 8. Confirmed into 2C on the 11:00AM out of IAH. Considering I got there just before boarding, I was happy with that gift. Two volunteers before me jumped on the 8:10. Wanted to get there earlier but I was towing a sleepy wife (on a separate PNR/took OG 7:10 flight).
That's about the best I've received on a short domestic flight, so far. Spent my time in that atrocious United Club at Terminal A.