I don't see any 3x here. In this chart, each miner has a similar block-per-hashrate
Unless you're saying that their true hashrate is three times smaller than what's reported here?
Discussion
Correct, their true hashrate is about 15 EH/s
Mempool.space just estimates the hashrate pf each pool by counting how many blocks each pool produced and saying how much hashrate they'd be *expected* to have in order to do that. So when you get lucky, it looks like you have more hashrate than you do. Ocean reports their actual hashrate on their website, ocean.xyz/dashboard