[...] but requiring members to mention the product/service in their sig space if they're engaged in a discussion about a set of products/services in which it belongs is just not good--unless that sort of posting is explicitly prohibited in the campaign's rules, and even then I think it's crossing a line.
This has nothing to do with what I said, since I do not require anyone to run around the forum and advertise a service or product.
We're talking about something else... that when you list a list of competitors, mentioning a project that rents your signature is a matter of business ethics.