Can a solo maintainer be considered to be an open-source software steward?
No. As defined in Article 3(14), an open-source software steward must be a legal person (e.g. a company, an organization, etc.) in contrast with a natural person (i.e. a human being). The obligations of open-source software stewards described in Article 24 therefore do not apply to solo maintainers. It is worth noting however, that natural persons are subject to the same obligations as legal persons would be should they monetize their poject.
Disclaimer
Disclaimer: The information contained in this FAQ is of a general nature only and is not intended to address the specific circumstances of any particular individual or entity. It is not necessarily comprehensive, complete, accurate, or up to date. It does not constitute professional or legal advice. If you need specific advice, you should consult a suitably qualified professional.