According to research by Toni Wahrstätter, a researcher at the Ethereum Foundation, about 72% of the data blocks released on MEV-Boost are now considered "censored," higher than the approximately 25% in November 2022. This metric measures the blocks assembled by MEV-Boost block builders, and according to statistical analysis, these builders seem to deliberately exclude encrypted addresses subject to US OFAC sanctions.Wahrstätter explained: "Block builders have the right to decide which transactions (and in what order) to include in their blocks, and which transactions they want to review. This means that block builders can decide the content of the blockchain."