Forum OpenACS Q&A: Response to Experience with Open Publication Licence?

but this commercial activity clause is not explicitely articulated in the OPL.

So my concerns are:

1.) How can I automatically set all contributions under OPL. (I will probably put it in the "User Aggreement" everyone will have to "sign")

2.) How can I avoid further commercial use of this content. Is it possible to articulate your own copyright option that is not officially part of OPL?

Thanks