A promise we make from the beginning is we're definitely not ever going to be selling any of your data. We don't have an incentive to since we're selling the service directly to the user as a subscription.
Here's the basic manifesto of the SpendWeek framework in case anyone's interested: https://www.spendweek.com/blog/you-need-a-different-budget/
My approach won't appeal to a lot of folks, but there are dozens of us who find it super useful: https://www.spendlight.com/#how-it-works
We're on the same page regarding privacy. Except for taking money for the subscription, I keep my hands off bank accounts. And for those wanting a complete air gap, there's always the printable paper version: https://www.spendlight.com/download/paper-spending-journal
In other words, the budget would get "broken" more often in the week-to-week habits than the monthly ones... hence, the resulting focus of my tool.