Tether’s Ghost Flag: How a 2021 Blacklist Lock Left MetaMask’s Swap Architecture Holding Trapped USDT

A MetaMask swap contract has been on Tether's blacklist since 2021, unable to move its own USDT for nearly five years. The discovery, made by an unnamed source, reveals that millions of users unknowingly rely on this compromised architecture. The trapped USDT remains frozen, raising concerns about the integrity of MetaMask's built-in swap feature.