It is not abuse to charge what amounts to a relatively small fee for a useful service.
It's not "a relatively small fee for a useful service".
It's an unnecessary fee to use self-hosted (i.e., not GitHub-hosted) components in CI pipelines.
It's not "a relatively small fee for a useful service".
It's an unnecessary fee to use self-hosted (i.e., not GitHub-hosted) components in CI pipelines.