Jim Cecropia wrote

Why is it (for speech reasons) NOT a public forum? It is not a membership

club, per se, anyone can post on it, and anyone can read it.

That just says it's effectively public. It's not intended as a forum; we all know what it is intended for, and 'WP is not a soapbox' says that is _not_ as a forum. If something is set up online for purpose A, and has a policy saying that purpose B is not what it's for, it is quite reasonable to enforce the non-use for purpose B where that conflicts with purpose A. Purpose B could be advertising, self-promotion, or political ranting.

Charles