Now it's free. FREE (F.R.E.E, KOSTENLOS) What part was not understood? Updated by its main creator, who has regrasado after 5 years.
Why do not they add it? Because they deny? I do not understand anything. If you already have it in your store, but from the page of bukkit ...
I doubt that the original author update the page someday, because now he uses spigotmc.org. And I already showed that page to you in section "request plugin".
See this. Is now free. and on spigot. https://www.spigotmc.org/resources/official-mcmmo.63489/ 
For what denied? 
