Ultimately, a good service contract is the Bible your company adheres to. Be sure to apply it to all customers. That`s not to say you can`t be inflexible, but if everything else fails, the signed agreement is something you can build on. Of course, they can resign at any time. However, they are contractually responsible for the entire monthly invoice. This simplifies invoicing. And if they resign before the fourth monthly bill, they are subject to a cancellation fee. I do this to minimize losses resulting from short-term agreements. Here too, I want to establish a predictable service that generates reliable revenue. In other words, a good contract produces your service.
If you sell your service as a product, you have established a standard promotion model that you can apply to all pools.