I've read about others getting this, but it was my first time in several years. I got a call today from Delta, telling me my MSP-ATL flight Sunday morning was oversold (Final Four?) and would I be willing to reroute through SLC for a $300 voucher. Without prompting, they increased the offer to $500 when they saw that I'd lose Comfort Plus on one leg. Since I'm traveling with a colleague (FO status), I asked if they'd give him the same offer, and they did. So a $500 voucher to leave 45 minutes later, arrive at my original time, but probably spend a three hour SLC-ATL flight in a middle seat three rows from the bathrooms. I'll regret it on Sunday and then Monday I'll be really glad I took it.