How to maximize the new statement credits on the Delta Amex cards

In early February, American Express introduced new statement credits to six of Delta Air Lines’ seven cobranded cards: Delta SkyMiles® Gold American Express Card Delta SkyMiles® Gold Business American Express Card Delta SkyMiles® Platinum American Express Card Delta SkyMiles® Platinum Business American Express Card Delta SkyMiles® Reserve American Express Card Delta SkyMiles® Reserve Business American …