Built for Publishers

Instant Articles keeps publishers in control. Publishers decide what to share on Facebook, with article templates that mirror the look and feel of their brands. Publishers can even automate their workflow by using RSS to publish Instant Articles directly from their existing content management systems.

– Instant Articles

(My emphasize.)

Yes, this is the way to do it. If you want people to add stuff to your silo, make it easy for them to do it using their existing infrastructure, and thereby enabling them to cross-post to the silo, as opposed to exclusively create and post there.

And yes, using a tried and tested technology like RSS is a smart move. No, it’s not the latest hotness. Yes, XML feels clunky. But it’s a frozen format. It’s widely understood, easy to implement and most publishers already have it implemented.