Delta is targeting travel originating from a few cities, the ones that are known now are:
St Louis ,
Raleigh,
Pittsburgh and
Nashville.
Discussion on FT about different cities that have been tried.Registration can be done separately for each city’s promotion, and each roundtrip originating in that city will earn double elite qualifying miles and bonus miles as follows:
•5,000 bonus miles to Delta hub cities
•10,000 bonus miles to other cities in the North America
•25,000 bonus miles for international travel beyon North America in coach
•50,000 bonus miles for international travel beyon North America in busines class
Purchase tickets by November 30 for travel through December 31, and naturally the bonus is valid for travel only on Delta and Delta Connection metal (no codeshares or partner flights). Bonuses can be earned over and over during the promotion period.
I know that they are skypesos but lots of pesos if you're flying anyways is nice.