You can call it penalizing solo travelers, you can call it inventivizing group travelers. If you look at them relative to each other, both are true.
This just in: Airlines penalize those not traveling for bereavement.
Airlines don't provide bereavement discounts anymore.
Delta does.
Yup. It's funny how this stuff evolves.
You used to see "surcharge for visa" but visa made that illegal.
So now you see "discount for cash/debit", and everyone is happy!
Visa isn't happy. But fuck them in particular.
Unfortunately you don't see that in the EU because the EU would rather have centrally controlled financial transactions than act in the interest of the citizens.