Under Regulation D, depositors are entitled to 6 outbound transfers per month from a savings account (there is no limit on the number of inbound transfers). Reg. D does not apply to checking accounts, which have no transfer limits.
Max’s monthly optimization is designed to use no more than 1 outbound transfer per month from each savings account. In between optimizations, Max members can elect to make additional funds transfers on their own. However, given that ACH transfers typically take 1-3 days to clear, it would be difficult to exceed the Reg. D limitation on the number of monthly outbound transfers from a savings account solely by using Max.
Note: The 6 transfer per month limit has been temporarily suspended by the Federal Reserve due to potentially urgent needs during the Coronavirus pandemic.