Hi @Carlton 
According to the official Databricks documentation, the Free Edition comes with several limitations under a fair usage policy. For example, it explicitly states: “If you exceed your quota, your workspace’s compute resources will be shut down and unavailable for the rest of the day. Your data and settings will not be deleted.” This means the “out of credits” message does not refer to monetary credits but rather to usage limits on free serverless compute resources, such as SQL warehouses, which are restricted to a 2X-Small size with daily quotas. Once these quotas are consumed, you must wait until they reset or upgrade to a paid plan to continue running workloads.
https://docs.databricks.com/aws/en/getting-started/free-edition-limitations