They've reopen the registration and they said (updated rules):
"WARNING: Only sign up if you are currently on your regular home ISP.
Do NOT sign up if you are currently connected to via a Tor, Proxy, VPN, VPS, Wireless/Mobile tethering service (including 4G LTE), Seedbox proxy service or browser anonymiser of any kind. Failure to heed this warning will result in your account being IMMEDIATELY DISABLED. (See Rules)"
So, my account was immediately disabled because I'm using my Mobile IP (Hotspot). Sad... But I can get it back using the irc channel stated on the registration page with regular home ISP.