Not only no delivery fee, but back in the day, Dominos was free if they didnt get it to you in 30 minutes or less (area restrictions applied). That didnt last and it became a discount if they were late. Not sure when that disappeared.
The Domino's delivery drivers kept getting into car accidents trying to reach the houses within 30 minutes. Domino's got sued over it by people that were hit by Domino's drivers. So Domino's stopped doing it