Block published a press release [0] saying they intend to sue. But, that article by Hindenburg seems quite in-depth and they'll have a hard time squeezing themselves out of this.
Worth noting that the title of this HN post is a little misleading - and Hindenburg actually have not accused Block of fraud (only of facilitating others to commit fraud through their platform).
Block has systematically taken advantage of the demographics it claims to be helping. The “magic” behind Block’s business has not been disruptive innovation, but rather the company’s willingness to facilitate fraud against consumers and the government, avoid regulation, dress up predatory loans and fees as revolutionary technology, and mislead investors with inflated metrics.