Apply by June 26th and you can get the Amex Business Gold Rewards Card with a 75,000 point Membership Rewards bonus when you spend $10,000 in 4 months (non-affiliate application link. That’s not a small amount of spend, but it’s not out of the question, and you’ll have 85,000 Membership Rewards points at the end of that.
The card has a $175 annual fee, though it’s waived the first year. You’ll get 3x points on Airfare spend and 2X points on Advertising, Gas and Shipping.
One quick note, though: The Terms say “Welcome bonus offer not available to applicants who have had this product or any Business Gold, Green or Platinum Card® account within the last 12 months.” In other words, it appears you CAN churn the card as long as it’s been a year since you had one of them.
You can, however, get the personal version of the card — The Amex Premier Rewards Gold — in addition to the Biz version. You’ll get 25,000 Membership Rewards points after spending $2,000 in 3 months.
Application link here (I do get a bounty for that one). First year fee waived, $175 thereafter, with triple points on airfare.
(Thanks to this FT thread for the heads up).