I think it was actually a 48-hour period not 24.
Also, Zerohedge puts out a lot of bullshit and I have never once seen a retraction.
Then there is the word 'trader' being used for every person who signs up. The number of users who ever buy or sell anything is unknown.

Okay so it's not as sensational as it sounds at first but it still is further evidence that exponential growth is happening.