We scoped a fiat-to-crypto onramp as a payments job. Rails, wallets, integrations. Then the KYC queue went live and the moderation screen turned out to be the product: the ops crew lived in it all day, and we had budgeted it as a throwaway admin panel.
Now we ask who sits in the thing for eight hours before we ask what it connects to. Worth knowing who the real daily user is on your side.