I ran a SAAS company for 8 years, going from zero to double-digit million rev per year.
The answer is a clear no. They can PAY YOU to make custom plots/charts/reporting or run queries if they want to understand what it does better. There is almost always a way to achieve any business goal without requiring source code.
The only case I can think of source code needing formal verification by a third party is if you're targeting drones to kill people or government jailing people. That doesn't sound like a commercial company in any event.
The answer is a clear no. They can PAY YOU to make custom plots/charts/reporting or run queries if they want to understand what it does better. There is almost always a way to achieve any business goal without requiring source code.
The only case I can think of source code needing formal verification by a third party is if you're targeting drones to kill people or government jailing people. That doesn't sound like a commercial company in any event.