[@Everett]
The exact reasoning was that characters should not be able to surpass sound speed on their own. ki's is a specific, speed based ability, like the "Haste" spell from D&D. 

And there's more than enough room for more participants!

To do the drop-down, there is a 'toggle format cheat sheet at the bottom of the page. Go down to where it says 'hider' and it will show you how to do it.