Mining required specialized hardware and access to loads of electricity; staking requires access to capital. For that reason, most major crypto exchanges have lined up to participate in staking ETH. Some, like Coinbase, have explicitly stated that they’re betting their future on staking services. The move makes sense; the more capital an entity pledges, the greater the yield. An exchange like Coinbase, by pledging users’ ETH, stands to proportionally accrue far more than an individual staker.