To those who have a problem with DL's practice here, I ask: would you prefer the alternative?

The alternative would surely be that DL did not offer this promotion, as it's highly unlikely that they'll offer an award ticket anywhere in the world for two or three discount domestic fares, right?

In this case, the airline made an offer, you're free to accept it or not. There's no deception, no fraud, and not even a hint of an ethical lapse.

I've seen posts here and on other FF forums that seem to think that the customer actually IS always right, even when they're not. I don't subscribe to that. When the terms and conditions of business are available in writing, you can hardly call it deceptive or fraud, and in my experience, it is usually people who are lazy or stupid, or have this sense of entitlement who have a problem with it.

So to those who disagree, I'd ask what kind of system they'd prefer.