I found Japanese big communite is buying this

1. Japanese famous user he has 116k followers advertise XP

2. He attract 9k (now increasing) users on Japanese XP communite

His name is Ikeda Hayato
https://twitter.com/ihayato
https://twitter.com/IHayato/status/941816936039563264

Japanese XP communite invite link
https://discordapp.com/invite/AdtreBG

I think you can buy more XP.