It's almost quaint how this December 2019 article talks about "the concern surrounding the creation of large swaths of Tether in 2017", when about $2.5 billion of Tether was issued.
In the time since it was published, when Tether had issued about $4.5 billion total, there have been over $14 billion additional Tether, a 4X expansion of the total supply, or 7.5X what was described as "large swaths of Tether" in this article.
The article also incorrectly claims that curve25519-dalek has never had security audits. It's had at least two by reputable cryptography auditing firms (Quarkslab and NCC), the former of which is public (the NCC audit was done at the request of my former employer and is private, but like the Quarkslab audit only found minor issues):
In the time since it was published, when Tether had issued about $4.5 billion total, there have been over $14 billion additional Tether, a 4X expansion of the total supply, or 7.5X what was described as "large swaths of Tether" in this article.