Copying my earlier instructions to self-refer yourself for the Biz Green from your new Biz Platinum.
Check your "Congratulations! You've been approved" e-mail that you received following approval for the Biz Plat.
Click the "Get Started" button.
Confirm your birth year and zip code.
You can either set up a new account for the Biz Plat or add it to an existing account.
Once set up, from your "Home" screen, scroll down to the "Refer Friends. Get Rewarded" section, confirm You can earn: 20,000 Membership Rewards® points for each approved referral – up to 55,000 points per calendar year.* Limited Time Offer! Ends 08/08/2018. Terms Apply, and click the "Refer Now" button.
Copy the referral link.
Paste the referral link into an incognito window. You should see a checkmark in a circle next to "You've been referred!"
Scroll down to where you see the Biz Green and BGR. You should see the message:
More American Express OPEN Cards
Looking for something different? Both you and your friend can still get rewarded if you select one of the cards below.
Click the card you want to apply for, and Apply!
Congratulations!
You should get 20k MR for the self-referral, 5k MR welcome bonus after making your first purchase on the Biz Green, and there are reports that Amex is double crediting the 5k MR bonus so keep an eye out for that. And since these cards have no effect on 5/24, you might also consider referring DH. Good luck!