According to the Forum, you need to have 600 messages, this can be achieved by commenting on user posts and helping out other users until you reach 600 messages.
Once this is achieved within a few minutes your account will be automatically upgraded and you'll be able to use this hack, see below link:
found out today that there might be even more hacks for games if you are premium members. thats the reason i'm trying to upgrade. getting shot to pieces in Pubg pc version from miles away