Or the $20 leak was fake in the first place. Elon doesn't seem like the type of person who would be easily convinced of something that easily and that fast by an underling.You know Elon wanted $20 and someone at Twitter had to convince him that $8 is the maximum that wouldn't make him look super greedy. It's still a +60% increase amidst a global recession.
Also possible Elon leaked the $20 so that $8 would sound "cheap" in comparison.