Research shows that we attribute a significantly higher value to things when there are barriers in the way of getting access to them, as well as when there are barriers in the way of others getting access to what we already have.
The threat of scarcity and allure of exclusivity is what drives us to pursue limited-edition products and limited-access services. If you have a product that is able to be modified in a certain way to create this Limited Access effect, it may be in your interest to create it.
It is important for people to pay for access. In a study of Amazon Prime members, those who paid for a subscription had a higher overall willingness to spend and had greater brand loyalty than Prime Members who were given a free trial.