I'm not sure what you mean by "their thing." I mentioned four of their selling points above:
- build your own templates
- receive higher payouts
- LN payouts for small miners
- coinbase payouts for large miners
They've also been changing the narrative around the usefulness of hashrate markets. For a long time they've been seen as a gambling play, where the "house" (Nicehash, etc) has a 3% advantage (determined by the rental fee) that users have to "overcome" by correctly guessing which pool is going to have a lucky streak next, and aiming the hashrate there.
But now people are highlighting a second reason to use hashrate rentals: it boosts your ability to build your own blocks, which helps you do stuff like signal for soft forks and thus participate in bitcoin's consensus. The cost is a 3% fee on what you would earn without renting hashrate, but for some, that is worth it. (Plus one hashrate marketplace, Braiins, is currently running a discount of 0% fees, which is part of why I suspect Ocean's hashrate has gone up lately.)
To learn more, visit their website, ocean.xyz
