This is a tribute pool, not real earnings.

Your browser really does compute SHA-256d hashes, and the collective hashrate below is real. But a browser is roughly a trillion times slower than the Bitcoin network, so no block reward is ever mined and no bitcoin is ever paid out. The sats figure is a symbolic score — one sat per billion hashes contributed — measuring the community's effort, nothing more. Mining is fully voluntary, stops the moment you press stop, and pauses when you leave this tab.