They're not buying the product. They're buying the company so they can pivot and implement their vision.
Basically, the investors lost interest but the team is passionate and see a path to success. They won't be maintaining the old product, they're going in new direction.
It's actually the opposite. They're buying the assets (the software), not the company.
> To ensure continuity for users and fans, as well as to continue building what we regard as an important technology, Dark Inc has sold the assets – the Darklang language, the blog, the hosted service, the Discord, etc, darklang.com, etc – to a new company started by Dark Inc's former employees.
In other words, there's a new company (Darklang Inc.) that has purchased the assets of Dark Inc. (for probably relatively little money). This clears the cap table, making it easier for the former employees (now founders) to raise money for the new corporation.
Basically, the investors lost interest but the team is passionate and see a path to success. They won't be maintaining the old product, they're going in new direction.