How many of them can you convert into customers?
What is a customer?
A customer is an entity that has PAID you for your good or service
Your CUSTOMERS table should always start like this.
| Customer ID | First Paid At |
| cus111 | 2022-03-09 00:00:00 |
| cus121 | 2022-03-10 00:00:00 |
The most important property of your customers is the DATE associated with them.
Since your Customer is defined by the date that they first paid you, your customer table may simply be an aggregation of your Revenue table.