Folks are just having a little fun with you. Let's face it, if you have the disposable income to consider dropping thousands for J on mileage runs for MQDs, I'm sure you can shift a little spending over to your DL Amex to hit the $25k waiver threshold. Your question is legitimate, but for good options with the least amount of work, check out the mileage run forum. There's a premium section that will generally allow your fare to qualify for the MQD multipliers.