The limits being real and the limits being the point are different claims, and the second one is the one I would argue.
A hundred thousand per transaction and a million a day is not a feature aimed at people buying laptops. It is an advertisement for exactly the customer who is expensive to review, which means the review is not an exception to the product, it is the product. They are selling headroom and charging for it in scrutiny, and the price is not on the pricing page.
None of that contradicts your four accounts. It just means the sampling you observed is not a bug in an otherwise permissive system. It is the system.