Components licensed under the Confluent Community License can be used for commercial purposes with the exception of the “Excluded Purpose” in the license:
“Excluded Purpose ” means making available any software-as-a-service, platform-as-a-service, infrastructure-as-a-service or other similar online service that competes with Confluent products or services that provide the Software.
This FAQ is a helpful resource and includes examples, as is the blog introducing the license. You can contact email@example.com with questions about your specific situation.
Are you referring to the connectors on Confluent Hub shown on Confluent Hub if you check this box?
You’d want to look at the individual connectors – some are Apache 2.0-licensed and some are Confluent Community License where the SaaS excluded purpose applies.