Only a certain kind of users will use your service

Only a certain kind of users will use your service, its because only those users can see the value and compatibility between their way of thinking and the service you provide.
Not all compatible will be using your service, because some have other thoughts, then some do not have money to pay for it, then some those who do pay, also need motivation to even use your service, and those who use the service is what may produce the value from your service.