you’re now eligible to earn 2,500 bonus miles by spending $3,000 in purchases (not including returns) on your United MileagePlus® Explorer Card between October 1 and December 31, 2017.

https://promotions.united.com/offers/2017bonusmilesoffer

이렇게 이메일 와서 등록했는데, 스팬팅 채우실것없으신분들은 이거라두...ㅎㅎ 3000불 사용에 5500마일이면, 나름 x2 정도 되잖아요..ㅎㅎ