From the BYC store: "Here are a few of the initial upgrades you’ll get as a Premium Feather Member:
1. Ability to have several people in a group conversation
2. Ability to delete posts and lock and unlock your own threads
3. A new badge: Premium Feather Member
4. The ability to choose your own custom title
5. Automatic No Ads
6. First peek at new features and specials before we roll them out to the rest of the members.
7. Access to a private forum to discuss new features and specials.
8. Ability to change your own username
9. Signature permissions
There's more and will be added as they are rolled out!"