Either you protect your IP and make it hard to use your product in this environment, or you don't and loose your rights and sooner or later your business. Either way the future doesn't seem very bright.
What Paizo did here makes it harder to share your campaign online, but it's still easy to use the info as long as you keep it private. They didn't ask Obsidian Portal to kill the campaign, or to kick the user off, or even to completely remove the images: they just wanted to make sure they weren't there for public consumption. To me, that's a really great thing.
With everything going electronic, it's a lot easier for me to use their artwork at the table. I can use Photoshop to yank stuff out of PDFs, create my own handouts, etc. Paizo makes that easy, since I get PDFs of everything I subscribe to, I can order PDFs of old stuff, etc. That makes it a lot easier to remaster a lot of stuff for my campaign and Paizo doesn't seem to care.
The problem comes in when you want to share your campaign with the wider world. Paizo tries to stop much of their material from being posted that's widely usable. They allow (through their
Community Use Policy) you to use certain content for unlimited distribution.
This makes it tough if you want to make a really graphically rich campaign site, especially because if you put that much work into it, you want to share it with everyone. It takes more work to find graphics that you can use in that manner, and you lose out on all sorts of great work that the artists have done, because it's in the book but you can't share it broadly. I've felt this frustration, since I did campaign newsletters for my group that contained character art from the adventure (B10 Night's Dark Terror) that I'd love to post here, but I know I don't have rights to the images I used.
Since a lot of the joy and value in the Internet is the ability to share, it's more and more important that we find ways to do this while protecting the rights of content creators. I don't have an answer to this. I like the direction that Paizo and WotC have gone by allowing certain content a very broad license, and I hope more companies will do the same. I just hope we can find other ways to speed things along as well.