If so, it would be in the unusual shape that it is a top-dollar one rather than cover-the-failure-with-a-pretty-ending one. But in this case, Zoom is probably actually interested in the security tech that Keybase has apart from the talent, they're just not interested in the product.
No, you didn't miss anything. As you probably expected, it's just my deductions from context. I may be completely wrong. I still do believe in them, but obviously no one else needs to.