Setting the scene

You have recently been promoted to be the team lead for a brand-new engineering team in your company, the payments and subscriptions team. As this is a new area for you, you diligently organize time with experts in the department to discuss the basics of the domain and how it works. Here is their response:

“When a lead uses our app for the first time, they must pick one of three subscription plans. These are basic, premium, and exclusive. Depending on which they pick determines which features they get access to within the app. This may change over time. Once a subscription plan has been created, we consider that the lead has converted to a customer, and we call them a customer until they churn. At this point, we call them a lead again. After 6 months, we call them a lost lead and we might target them with a re-engagement campaign, which could include a discount code. Once a plan is created, we set up a recurring payment to capture funds from the customer...