Continuing on the subject of being able to scale down to zero servers, the cost of serverless code is very flexible. Due to auto-scaling, providers are able to charge according to resource usage. This means that you only pay according to usage, which has benefits for all developers, but for small businesses most of all. If your business has lots of customers one month, you can scale accordingly and pay your higher bill with the higher revenue you have made. If you have a quieter month, your serverless computing bill will be proportionally lower for that lower revenue period.