A community member discovered that two Builders on the BSC chain, 48 Club and Blockrazor, are suspected of illegally manipulating transaction order to bypass normal competition mechanisms and gain benefits for themselves. This behavior is essentially illegal arbitrage, which undermines the fairness on the chain and seriously infringes on the rights and interests of ordinary users and searchers.

Data analysis from the blockchain shows that the 48 Club contract uses builder privileges to precisely manipulate transaction ordering, extracting MEV from both public and private transactions, even "sandwiching" private transactions. These operations can only be carried out in blocks built by themselves, indicating that they control the order flow and block ordering rights. Searchers have no way to participate in the competition, MEV is monopolized by builders, which seriously violates the principles of decentralization and fair competition.

The relevant behavior has not yet been officially confirmed, but it has triggered widespread discussions on BSC's MEV distribution mechanism, the security of private transactions, and the abuse of builder privileges. Compared to ETH and Solana, the degree of decentralization of BSC's ordering structure is now being questioned.