Subscription ecommerce stores are stores that sell products or services on a subscription bases. For example, the customer will receive a box with random products once a month. Another example is subscription to premium services provided by apps.

What tools do you think will help you achieve this type of model for an ecommerce store?

Medusa's headless commerce architecture makes it possible to integrate it with any third-party tool that can help you achieve the use case you have in mind. Alternatively, you are also capable of creating your own custom experience due to its open source nature and the good development experience it provides.