nostr:npub1kjauf5ae53pstgv9u7mkfw2lzluyvtqhev6tj5fx85kfthck7r8qgke5gq I may use pixelfed.com/sup, that being said, Pixelfed does have a list of reserved usernames and command that should be run regularly to "take over" usernames that may conflict with url routes (and they've been needed a few times)
nostr:npub12tyk735v52ju032qahe3k2r520jlsujaem6xr8n0ex6u7eqj0anq59vnqc Do what #Threads did: Instead of seizing the user handle away, they just added “app” at the end. So just do “SupApp” instead.
Another suggestion is to use a subdomain (sup.pixelfed.social) or a different domain (avoid SupPix as that sounds…yeah…just do not do it! 😂).