These discussions are rarely as direct as one might believe, it usually involves translators, promoters, spokesmen lurking in the background. Tchatche or GO Chat to get a better idea. As a general rule forum discussions begin by a question. The debate is then launched and a series of responding messages follow. The pace of the discussion is variable.
Several weeks can go by before things can really begin.
It is possible to check at any time the discussion's history. Technically speaking, it is not difficult to integrate a forum into your site. This is why many web developers will systematically offer you this option as an added value. The choice of themes for discussion is important. If the subject matter is not sufficiently defined internet users won't waste their time talking about the weather.