Take WordPress. The open-source code runs millions of self-hosted sites, but WordPress.com is a commercial platform. We already distinguish the software from the service in practice, and nobody confuses the two. My exemption merely writes that existing, workable line into law. A company that runs a centralized service, harvests data, and pushes recommendations is still a platform, open-source label or not. The code itself is infrastructure. The operator is the publisher. So DataEthics_D's "loophole" collapses: you can't hide behind a license any more than a phone carrier can hide behind the phone.