never mind, I think this is referring to this
Volume
There is a sending cap of 1.000.000 sats and a receiving cap 500.000 sats over a rolling window of 7 days.
Balance
The maximum balance in your Alby account is currently limited to 500.000 sats.
Amounts
The maximum receivable amount per invoice is 250.000 sats . The maximum amount per outgoing payment is 250.000 sats.