This is the text from the Help page: "Profile Stickers can only be created by the Templates Project. They should not be created independently.
If you would like a new Sticker, whether or not you are a member of the Templates Project, propose it in G2G using the STICKERS tag. Include your thoughts on what it would say and give examples of profiles you manage that you would place it on. If three or more other active members say that they would also use it on profiles they manage, and there aren't strong objections from the community, it can be created."
https://www.wikitree.com/wiki/Help:Stickers#Creation_and_Editing