I just got this in the email. Is it worth it to upgrade? Looks like 25K after first purchase. I have AMEX gold now. Or should I wait for a bigger offer like 50K or more later this year? 25,000 Membership Rewards points applies to your first purchase on the Business Platinum Card by 07/31/13 and is available for first-time upgrades to Business Platinum Card only. You are eligible to earn points for only one Card account. Additional Card members are not eligible. Points will be credited to your Membership Rewards®account 6 to 8 weeks after your first purchase. No minimum purchase required.