AWS has no such thing. It also is not an alternate either way since the owner of the first payment method would have this in an MPA, not in a member account, and in AWS, member accounts are not considered payers and any payment methods are ignored.

The article makes a variety of claims, some of which can be dismissed because they factually do not exist with AWS, and some of which cannot be verified at all. But precedent shows that when your middleman in a savings scheme drops out, you are screwed, and that is what happened here.

That doesn't make this fun, and it would be better if everyone had a personal account manager, but that's not the reality of today.