AMEX Bestbuy Spend $250, get $25 Back & Delta Bonus Promo

안녕하세요~

Amex Offers For You에 보니, 아래의 딜이 있습니다.

Get a one-time $25 statement credit by using your enrolled Card to make a single purchase of $250 or more at Best Buy by 9/8/2013.

그렇잖아도 $579.99 랩탑을 한대 구매하려고 하는데요, Bestbuy라면 5% CashBack 받는 Shopdiscover가 진리겠지만,

아멕스 오퍼도 괜찮은것 같아요. 일단 $25 Credit + MR Point 579 적립이 되니까요~

질문이 있습니다.

Delta Skymiles Shopping에서 Back-to-School Promo로 Skymiles 로긴해서 구매하면 일정금액마다 보너스 마일을 준다는데요,

저같은 경우, $579.99만큼 Bestbuy에서 쓸 경우, $25 Credit + MR Point 579 + Delta 579 Miles + Delta 1250 Bonus Miles 적립이 가능한지요?

아니면, Third Party 웹사이트 통해서 접속했으므로, $25 Credit은 못받고, MR Point 579 + Delta 579 Miles + Delta 1250 Bonus Miles 이렇게 될지요?

Skymiles Promo는 아래와 같습니다.

*Now through 8/31/13 11:59 PM EDT receive an additional 250 bonus miles with every cumulative $100 spent with SkyMiles Shopping; up to 2,500 bonus miles. Spend a cumulative amount of $100-$199 to earn 250 bonus miles; spend a cumulative amount of $200-$299 to earn 500 bonus miles; spend a cumulative amount of $300-$399 to earn 750 bonus miles; spend a cumulative amount of $400-$499 to earn 1,000 bonus miles; spend a cumulative amount of $500-$599 to earn 1,250 bonus miles; spend a cumulative amount of $600-$699 to earn 1,500 bonus miles; spend a cumulative amount of $700-$799 to earn 1,750 bonus miles; spend a cumulative amount of $800-$899 to earn 2,000 bonus miles; spend a cumulative amount of $900-$999 to earn 2,250 bonus miles; spend a cumulative amount of $1,000 or more to earn 2,500 bonus miles.

마적단님들 답변을 부탁드릴게요^^