a offer amex emailed me today
We value your Business Platinum CardŽ Membership, so we're sending you this special offer that's been automatically added to your Card. All you have to do is start using it.
Earn 40,000 Membership Rewards points after you spend $5,000 and an extra 10,000 points when you spend an additional $5,000 all on qualifying purchases on your Card from July 15 to October 15.
Remember, there's no need to enroll. Simply use your Card to take advantage of this special bonus offer.