Hello Moz!
A massive site that you've all heard of is looking to syndicate some of our original editorial content. This content is our bread and butter, and is one of the primary reasons why people use our site.
Note that this site is not a competitor of ours - we're in different verticals.
If this massive site were to use the content straight up, I'm fairly confident that they'd begin to outrank us for related terms pretty quickly due to their monstrous domain authority.
This is complex because they'd like to use bits and pieces of the content interspersed with their own content, so they can't just implement a cross-domain canonical. It'd also be difficult to load the content in an iframe with noindex,nofollow header tags since their own content (which they want indexed) will be mixed up with ours.
They're also not open to including a link back to the product pages where the corresponding reviews live on our site.
Are there other courses of action that could be proposed that would protect our valuable content?
Is there any evidence that using schema.org (Review and Organization schemas) pointing back to our review page URLs would provide attribution and prevent them from outranking us for associated terms?