Ethereum Improvement Proposal 2025 recommends backing ETH 1.0 development through block reward funding.
0.0055 ETHper block for 18 months (A total of 17050 ETH) as a developer block reward reserved for funding specific Ethereum1.X working groups. The working groups are State rent (750k), Better sync (360k), Finality gadget (360k), Fee market (360k), Testing infrastructure (360k). Governance of the funds will be through a multisig of trusted individuals from the ecosystem including client teams, the foundation, and the community.
EIP-1890 proposes a mechanism to capture a portion of block rewards for sustainably funding ongoing network development. That EIP sets values and addresses to zero and so does not actually collect any rewards. This proposal is to explicitly set those values and begin collecting a portion of block rewards for 18 months in order to fund Ethereum 1.X working groups and organization efforts. This funding will be used to repay an initial loan provided by investors in the community funding this work with a small amount of interest. After 18 months the block reward would again reduce to zero.