The Ethereum Foundation announced winners of its Merge Data Challenge in December 2022, distributing $127,500 to 14 winning entries whose work produced the first systematic, data-driven account of Ethereum's September 15, 2022 transition from proof-of-work (PoW) to proof-of-stake (PoS). The Beacon Chain, Ethereum's proof-of-stake coordination layer, had been running in parallel since December 2020, providing the infrastructure that made the Merge technically feasible after nearly two years of parallel operation. The nine-week competition drew 45 open submissions and surfaced findings on validator economics, supply dynamics, and censorship risks that have shaped debate about the network ever since.

Winners and Prize Structure

Two analysts each received the top Gold prize of $30,000: pintail for "Since the Merge: How Are Things Changing?", a sweeping analysis of network behavior in the weeks following the transition, and Jannik Luhn for "Attestation in Data."

Five Silver prizes at $10,000 each went to Jim McDonald for MEV relay impact research, the Ethereum Pools team for staking pool performance analysis, Ultrasound.Money for coverage of post-Merge supply economics, fmrmf for target convergence research, and Kirubakumaresh Rajendran for the EthLooker analytics dashboard. Seven Bronze awards at $2,500 each covered gas prices, block times, decentralization metrics, validator performance, and MEV behavior. Every submission was published as open-source, available for community extension.

The Foundation organized the challenge through its Ecosystem Support Program because the effects of the Merge on block production, validator incentives, and mempool behavior were not fully predictable before the transition. A committee of community members judged submissions on data quality, analytical rigor, and practical utility.

What the Data Found

The Gold-winning analysis by pintail identified several trends that have defined subsequent debate about Ethereum's validator layer. Within six weeks of the Merge, the share of blocks assembled by third-party specialists rather than validators jumped from 19% to 61%. This outsourcing arrangement (called MEV-boost, a system allowing validators to earn extra profit by delegating block construction to specialized builders) concentrates block-building power in fewer hands. The same analysis found that roughly half of all validators had not yet proposed a single block at the six-week mark, leaving that group earning annualized returns below 4%.

On MEV (maximal extractable value, a measure of profit extracted by reordering or inserting transactions into blocks), pintail wrote that "MEV levels are down between 30% (at the 10th centile) and 60% (at the 90th centile) compared to the year prior to the Merge," attributing the drop to market conditions rather than structural protocol changes.

The most consequential finding for non-US users may be the censorship data. By mid-October 2022, 51% of Ethereum blocks over a 24-hour window were OFAC-compliant, meaning they excluded transactions linked to sanctioned addresses such as those associated with Tornado Cash. That figure reached between 73% and 78% by November 2022, before subsequent data indicated a decline from that peak. Of the seven major MEV-boost relays active at the time, only three processed blocks without applying any sanctions filters.

On-Chain Supply Metrics

The Merge cut daily ETH issuance from roughly 13,000 ETH to approximately 800 ETH by eliminating miner block rewards. That is a reduction of about 90%. Combined with EIP-1559's fee-burn mechanism (active since August 2021, this burns a portion of each transaction fee rather than paying it to block producers), ETH's annual inflation rate fell from around 3.5 to 4% to roughly 0.5% or below. According to data from ultrasound.money tracking conditions through early 2025, well after the close of the challenge, the net ETH supply had contracted by more than 350,000 ETH from its post-Merge baseline. Ethereum's estimated annual electricity consumption also dropped from roughly 28.5 terawatt-hours to around 0.57 TWh, a reduction of approximately 99.95%, with the per-transaction carbon footprint falling from 109.71 kg of CO2 to 0.01 kg.

Regional Implications

The censorship findings carry direct weight for users in South Asia, Africa, and other regions where access to US financial infrastructure is politically or legally constrained. A majority of Ethereum blocks being processed by OFAC-compliant relays means US sanctions policy was, at least during this period, embedded into a significant portion of the network's transaction processing by default.

The energy reduction matters practically in countries with expensive or unreliable electricity. Running a proof-of-stake validator node now requires a fraction of the power that mining once demanded, which lowers participation costs for technically capable individuals in markets including India, Nigeria, and Kenya. Solo validator operation still requires a minimum stake of 32 ETH, a significant capital barrier; staking pools and liquid staking protocols offer alternative paths to participation that reduce this threshold considerably. India currently ranks as the top source of new crypto developers globally by volume, according to Electric Capital's 2024 report, and Nigeria accounts for approximately 3% of global blockchain developers, with 39% writing in Solidity, Ethereum's smart contract language. Rajendran's Silver award for EthLooker is a concrete example of contributors whose work reflects the global reach of Ethereum's developer community earning formal recognition and compensation through Foundation programs.

Looking Forward

All 45 challenge submissions were published as open-source at the time of the competition. Developers and researchers at institutions across Lagos, Nairobi, Mumbai, and elsewhere can build directly on the datasets without duplicating the underlying data collection work. The validator concentration picture (Lido held roughly 27 to 31% of staked ETH at the time, with the top seven entities controlling more than two-thirds of total stake) and the censorship trajectory both represent areas where the open data remains directly relevant to current policy and infrastructure debates.