That said I think you're undervaluing the potential of the OP. You say at [1] that one of the key things you've learned is that readers fund journalism because they care about having an impact. If successful, the approaches they're discussing could significantly increase the impact of journalists' work -- reusing the same Particles in different contexts, being able to provide multiple tailored versions of the same post that could resonate with different audiences, etc. And it also may point to ways for publishers to participate in and leverage the Buzzfeed/Facebook ecosystems while still providing additional value on their own sites/apps/publications.
So, agreed that it by itself isn't a business model solution, but don't write it off so quickly ...
[1] https://www.beaconreader.com/blog/beacon-immigration-3-milli...