This includes talk.origins - discussions of evolution and related issues, in their scientific aspects. The theological implications of creation and exegetical issues involving the creation account are fair game. Commercial use of Usenet is in flux. However such announcements must be for items of general interest to our readers, and relevant to Christianity. As a matter of policy, I do not accept postings with copyright notices, unless the notice clearly allows distribution without restriction.
Some groups sell access to netnews.
Since I do not want to have to get legal advice on individual postings, the safest thing seems to be to consistently refuse any restrictions on redistribution. I almost always send mail when I reject a posting. This means that if you don't see either the posting or a reject notice, some communications failure has probably happened. There is a tendency in Usenet groups for postings to include other postings, sometimes nested several levels deep. These discussions very quickly become impossible for anyone other than the participants to make sense of.