Sometimes it is difficult to tell that an article has been paid for.
Some media outlets have many paid articles.
In this case it is easy to understand, since in addition to the fact that the content has no negative reviews (if you read it carefully, anything that could be negative is disguised as a “technical challenge that has already been overcome”), the article explicitly states that it is a commissioned piece.
Inside Zcash: Encrypted Money at Planetary Scale
CoinDesk
Inside Zcash: Encrypted Money at Planetary Scale | CoinDesk Research
Explore how Zcash’s zk-SNARKs and default-shield wallet are scaling encrypted money for global use - privacy reimagined at planetary scale.