Early Birds Gets the Worms
If you happen to just learn about Persona Paper and you wanted to sign-up and give it a spin you are in for some bad news. New registration has been temporarily closed. Mind the word "temporarily." This is primarily due to the massive response of users from another writing site and so the new user registrations are now having an influx. With this volume, the site would need a number of moderators to help maintain the site.
This means that if you are an existing member here, you won't be able to call for any new referrals and thus you won't be able to take advantage of the referral system. But that is just temporary so no need to fret.
For those who still want to sign-up, you can send the Admin an email from the Contact page and they will notify you once they open the registration again.
*Image(s) used in this post is mine
*This post was 100% juiced from my brain