Once it becomes a closed system(end of distribution) there are number of things I believe you will see more of. Keeping in mind there will be far more users on the network then you see today. I see the LTBn as the News Corp. for the new world.
Tipping - You will have people tipping where needed to those people that put out great content. This will be both articles, podcasts, cartoons and forum posts. Those how put out great content will be rewarded where as those that submit crap won't get much.
The network will still have LTBc available to it to buy content(if they aren't getting enough submits) for the site via selling ads. I suspect there will also be some content that is only available behind paywalls be it on a membership or pay per use.
Content wise I believe you will still have everything that you have today but will also have video streaming(think youtube style) and full tv episodes/series that are also available.
Users will still get ltbc for posting in the forums via sold signatures. Look at bitcointalk where you can get paid for your signature or even here with Chain Radio who is already buying signatures.
