According to CoinMeta, investigators from Corvus Labs, the founder of Solana, have found that some Solana validators are providing TPU transaction flows to private buyers through Blockspace under Everstake. This allows these buyers to obtain order streams before transactions are executed, enabling them to carry out activities such as front-running, sandwich attacks, and JIT arbitrage. In return, the validators receive a share of the profits. On-chain tracking shows that operators such as Staking Facilities, ProStaking, RockawayX, and Stake Org have received relevant payments. It is claimed that there are already 39 validators involved, with approximately 56.6 million SOL tokens pledged, but Vacariu estimates that the actual number of tokens involved could be around 17 million.