Alternatively, why worry about it at all?
If several content creators produce something similar then let them compete against each other. If it is something the community wants people will find the approach they like best and use it.
Look at the Steam Workshop. For a popular game many different modders may do essentially the same thing. People post reviews and the community figures out which ones are good and which ones aren't.
Um, I think you're overlooking a very important aspect of all this. An example will help illustrate my concern. Let's say that User1 puts together a few of the Pathfinder rulebooks and distributes them under the OGL. Now User2 does the same thing. You adopt the material from User1 for whatever reason. Then User2 becomes the "fan-favorite" source and User1 abandons his efforts. So now you want to switch to the material from User2. Sounds good so far, right?
You import everything from User2. You now have duplicates of everything that was done by both User1 and User2. So you have go and clean all that content from User1 out. But wait. The content in your realm is all linked to the material from User1. So you also have to re-link all your content to the new material from User2. Both of those steps are going to be extremely annoying, right?
There's no problem with the wild west for people creating their own content. It will work fine for that, and I'm not worried in the slightest. The gotcha is with OGL material that can be provided by lots of different users that overlaps. Users will experience both the issues that I outlined above, and it will get even more convoluted if there are a half-dozen users providing the same content instead of just two.
I hope that makes more sense!
