BitMine Immersion Technologies (BMNR) has launched an institutional-grade Ethereum (ETH) staking platform dubbed 'MAVAN', a move the company says positions it as the world's largest single Ethereum staker and signals intensifying competition for 'institutional demand' in on-chain yield products. The U.S.-based blockchain infrastructure firm announced the official rollout of MAVAN—short for 'Made in America Validator Network'—on March 25.