All these usernames were initially blocked in 2022 when inactive usernames were taken away (the ban was necessary to prevent the owner from reclaiming it back to their channel). However, the ban label just didn't show up in the Fragment before. When someone made the first bid, Telegram lifted the ban during the conversion to NFT. These are internal workarounds that we probably just didn't see before. The ban label is currently not functioning correctly; it shows the internal ban from 2022.