2019.2 Update: See for a new update about the increased bonuses from referral link.
You should already know that, when you apply for some AmEx credit cards, you may see some higher signup bonuses if you use incognito mode, or with a VPN to increase your chance. See this post for details. For example, AmEx Everyday usually has a 10k or 15k regular signup bonus, but with incognito mode + VPN, you may see 25k offer.
Previously you can only see this kind of incognito offers via public links, and the offers generated by referral links are fixed. But recently AmEx has changed their referral system, people find that we can see higher incognito offers via referral links as well! HT: Walter Credit.
The following screenshot shows AmEx Everyday 25k offer. Note that both “Referral Offer” and “Special Offer For You” are appearing.
We can also see AmEx BCE $250 offer:
Walter Credit also saw a 75k offer for AmEx Platinum, but we can’t see it yet. That’s quite normal: as usual, higher incognito mode offers are highly YMMV.
This is a good news definitely. In the future, we can refer popular cards such as AmEx Everyday, and don’t need to worry about giving him/her an inferior offer any more!