Read the tos and admins comments about content. The rules are not for the content that members post. The people in jail are there for attacking other members. Anyone posting damaging or life threatening posts against members are just booted straight away for the most part.
Other members in jail are shills for stocks as well and went beyond spam limits.
You won't find anyone in jail for their sentiments about governments or other peoples sentiments unless threatened. And premium boards have less admin coverage within reason.
Look at the ban list to see who did the banning, and you'll see where admin drops off and mods take over because of the special setup this board has. DD board is similar, but is an free board, where admins have some more input.