The last part of his blog post says he chose Gandi[0] as a registrar because they do not have this clause, but I found a similar one in their General Conditions[1] contract[2]:

>By accepting Our Contracts and using Our services, You agree to abide to Our code of ethics which consists, in particular, of protecting and respecting minors, human dignity, public order and good moral standards, not infringing on the rights of third parties (private life, image, honor and reputation, trademarks, designs and models, copyrights, etc.) or the security of persons, property, the government, or the good working order of public institutions, and to help in the fight against abusive and/or deviant uses of the Internet (spamming, phishing, hacking, cracking, or attempts at hacking or cracking), or any other infraction as cited in the Penal Code.

I don't see anything about terminating your account "in its sole discretion", though. I personally use Gandi because they have a ton of TLDs and they've been fast and reliable, but I wouldn't hold it against them if they stuck one of these clauses in there.

[0]: https://www.gandi.net/

[1]: https://www.gandi.net/static/contracts/en/g2/pdf/MSA-1.0-EN....

[2]: https://www.gandi.net/contracts