Update: Some offers mentioned below are no longer available. View the current offers here.Most credit card issuers have rules in place to try to prevent credit card “gamers” from earning multiple bonuses for signing up for a slew of cards or the same cards over and over. This makes sense when you think of it from the perspective of the financial institutions: these issuers want long-term customers, not just customers looking to earn a bonus before dumping the card for another one.Chase’s 5/24 rule is perhaps the best known restriction — it factors in how many cards you’ve signed up for from all credit card issuers (not just Chase) over the last two years. Other banks like Citi and Bank of America also have varying rules restricting how often you can get another bonus. But comparatively, American Express has had some of the most restrictive card-specific anti-churning rules over the last few years, allowing one welcome bonus per “lifetime” per card type. Generally, the restriction has been listed in the offer terms and conditions as:Welcome offer not available to applicants who have or have had this Card.While this limits cardholders from getting a welcome bonus on the same card more than once, customers could still earn a welcome bonus on each of potentially dozens of American Express cards. However, last week the issuer added new language to the terms and conditions about welcome bonus eligibility:Welcome offer not available to applicants who have or have had this Card. We may also consider the number of American Express Cards you have opened and closed as well as other factors in making a decision on your welcome offer eligibility. [emphasis added]This new language immediately brought up some concerns. Specifically, would American Express use this language to approve you for a card, but then deny a welcome bonus after you had already met all the welcome bonus requirements?Well, it turns out there’s more to the story. Starting today, American Express has launched a new welcome bonus tool, letting potential cardholders know before a hard credit inquiry is initiated whether or not the cardholder is eligible for the welcome bonus.Here’s how it works. When you apply for an American Express credit card, if you’ve already had the card you’re applying for, you’ll receive the following message before your credit is pulled:Because you have or have had The Platinum Card, you are not eligible to receive the welcome offer.We have not yet performed a credit check. Would you still like to proceed?I tested this for myself on Tuesday night by re-applying for The Platinum Card® from American Express, which I currently have. Sure enough, I received this message when I tried to submit my application:However, despite selecting “Cancel Application” and receiving a confirmation page that I’d cancelled my application, I later received an email saying that Amex was “reviewing [my] application now.” It seems the issuer is still working out a few bugs in this new tool. [Update 6/19/18: American Express informs us it has now fixed a bug on its end that was sending out the confirmation email even after a customer had cancelled their application.]Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.If you haven’t had the particular card you’re applying for but you’re restricted by the new welcome bonus language due to your history with other Amex cards, you’ll receive the following message:Based on your history with American Express welcome offers, introductory APR offers, or the number of cards you have opened and closed, you are not eligible to receive this welcome offer.We have not yet performed a credit check. Would you still like to proceed?Image courtesy of American Express.Luckily this message didn’t pop up for me when I applied for — and was accepted for — the Hilton Honors Aspire Card from American Express.Which Cards Are Affected?If you’re wondering whether this restriction is only on certain cards, we can confirm that the new welcome bonus language appears on (at least) the following cards:The Business Platinum Card® from American ExpressThe Platinum Card® from American ExpressGold Delta SkyMiles® Credit Card from American ExpressStarwood Preferred Guest® Credit Card from American ExpressStarwood Preferred Guest® Business Credit Card from American ExpressThe Amex EveryDay® Credit Card from American ExpressGold Delta SkyMiles® Business Credit Card from American ExpressPlatinum Delta SkyMiles® Business Credit Card from American ExpressThe Hilton Honors American Express Business CardHilton Honors American Express Ascend CardBlue Delta SkyMiles® Credit Card from American ExpressBlue Cash Everyday® Card from American ExpressBlue Cash Preferred® Card from American ExpressBottom LineIt’s no secret that we at TPG have a lot of credit cards. So, we’re certainly disappointed about the new American Express welcome bonus restriction. That being said, we’re greatly relieved that you’ll be able to know in advance if you’re eligible for a welcome bonus using the new eligibility tool. We don’t know how many credit cards will be too many for American Express, but between us and our TPG readers, we’ll undoubtedly be hearing more reports about this in the weeks and months to come.