I specifically said that they don't have to fulfil the requests, just that they should be able to accept the requests. Throttling and rate limiting are valid ways to respond to having too many requests. Banning your paying customers' accounts because they sent too many requests is an insane way to deal with having too many requests.

Most companies want to make money. They would use this opportunity to upsell these high value customers to a more expensive plan with higher limits.

Google, which has some kind of dutch disease from making too much easy money from advertising, sees people trying to give them large amounts of money and thinks "How dare they attempt to buy our services? They're getting banned!"