One- through four-character @btc.email names may sell at invite-only auction while the pricing ladder is enabled. English ascending bids apply to the shortest names; four-character names use the same bidding mechanics with price-discovery rules documented for operators.

Bids bind when placed; late bids inside the anti-sniping window extend the close. If the high bid does not meet the published reserve, the auction ends without a sale. Winners receive Perpetual-class entitlement after operator settlement when invitations are open.