Clickbait title and no proof at all. HN hates all things crypto so much this gets upvotes even though the quality is less than Buzzfeed.

Rates like these are absolutely possible to get using Defi, futures and so on. One example of doing it risk free (staying delta neutral) is by selling crypto futures contracts and buying the underlying asset to hedge.

With that said, lenders like Celsius, Nexo, Crypto.com etc. should have transparent audits for sure. Same goes for stablecoin providers. Everyone pretty much agrees on this.