Pnutbadge
You can buy a badge for Pnut which unlocks you some special features like File Storage, Repost and follow E-mail notifications, RSS feed of personal and unified streams, and multi-factor authentication for pnut.io.
The Hashtag #pnutbadge in your bio shows you are a Pnut supporter.
For more, see the update at https://pnut.io/updates#2017-07-25.a