Nothing of that is going against the authors. They're just the battlefield when it comes to fighting the business model of selling votes, there is no other way to make the bid bots unprofitable. And they bring this upon themselves by continuously using these "services".

The whitepaper states as the reason for why we need downvotes:

Through the addition of negative voting it is possible for [...]stakeholders to nullify
the voting power of collusive groups or large, defecting stakeholders.

People selling votes as a business which is profitable for both the seller and the buyer are a prime example for defecting stakeholders, as they only benefit two parties instead of the whole platform. Stake should be used to vote, and the profits should come from curation rewards. Asking people to pay for votes is one of the main forms of abuse, and with the free downvotes it's finally possible to do something against it.

I usually don't comment when I downvote, as I expect most people to know why that happens already. I'm always answering to questions when they don't though.