Automatic scaling explained

Automatic scaling takes a percentage of each day's net mining rewards, from every miner on your account, and buys more hashrate with it. Whatever that percentage does not use stays in pending payout. The control sits on the dashboard, in the same card as pending payout, under that amount and above the BTC payout address. You can change it whenever you are not in Free Testing, and a new percentage applies to future rewards only.

Off, Balanced, and Max

Off (0%) leaves that day's net reward in pending payout. Balanced (50%) uses half of it to buy hashrate, and Max (100%) uses that day's net reward to buy hashrate. The percentage saves when you choose it, and there is no separate Save on this card.

In Settings & Security, then Profile, you can turn on Advanced mode. The three choices become a slider from 0% to 100%, any whole number, with buttons for 0%, 25%, 50%, 75%, and 100%. Turning Advanced mode off snaps back to the nearest choice: 0 to 24 becomes Off, 25 to 74 becomes Balanced, and 75 to 100 becomes Max.

Only future daily net rewards follow the new percentage. Pending payout already on the account stays as it is, including bitcoin that was waiting before you changed the percentage.

Where the hashrate goes

The purchase is hashrate on the newest, most efficient miner currently for sale, the one with the lowest W/TH. That is the best one available to buy, and it is not added onto older generations you already have. If that day's amount is too small to buy hashrate, the full net reward for that miner that day goes to pending payout instead, and the percentage you set does not change. Those purchases are listed under Transactions, then Purchases, when Show automatic scaling is on.

Free Testing

During Free Testing the control stays Off, so you can see the full day's net reward. You cannot change it until testing ends.