My service (not yet launched to public) is a pay model, right now the idea is a pay-for-what-you-use model, but having four general brackets to encourage people

My service (not yet launched to public) is a pay model, right now the idea is a pay-for-what-you-use model, but having four general brackets to encourage people to pick what suits them best and save a little money. People want to know that you're dedicated, and a subscription type service has a contract on both ends.