I'm in favor of that. I've seen it done at 1 or 2 tracks. They call it the buyback round, happens before 2nd round. Something else I've seen is to have a 2nd race for people who are out that starts after 3rd round. Much lower payout but better than nothing. No buybacks and you pay a separate entry fee. If you drove a long way and spent a lot of money, you would probably want the chance to go down the track a few more times.